8 ms·

I've been chasing infrasonic ranges in home audio for over 2 decades. You can't "detect" these frequencies in the normal way. You experience them by way of your

I've been chasing infrasonic ranges in home audio for over 2 decades. You can't "detect" these frequencies in the normal way. You experience them by way of your physical environment being excited by them. Feeling pressure waves move through whatever you are standing/sitting on can add an entire new dimension to the experience. I used to run experiments with friends and family using a 800L ported subwoofer tuned to ~13Hz with a 40Hz cutoff. Not one person would mistake it for being on vs off. Certain content makes these frequencies substantially more obvious. Classical music performed in large concert halls is one surprising candidate outside of Mission Impossible scenes. Being able to "feel" the original auditorium in your listening room is a very cool effect to me.

dehrmann 4y ago
> Classical music performed in large concert halls is one surprising candidate Dumb question: what's emitting these frequencies in an orchestra?
- elmomle 4y ago
  I imagine it's the space itself resonating more than anything else, being excited by higher-frequency harmonics.
- WorkerBee28474 4y ago
  Instruments that play <= 40Hz (E1) include double bass (either standard or with C extension), bass clarinet, and contrabass clarinet. Percussion also generates frequencies under 40Hz.
  - mrob 4y ago
    And percussion generates sharp transients, which require frequencies below the steady-state fundamental frequency to be reproduced accurately: https://en.wikipedia.org/wiki/Uncertainty_principle#Signal_processing https://en.wikipedia.org/wiki/Uncertainty_principle#Signal_p...
  - mechanical_bear 4y ago
    Also octobasse and subcontrabass saxophone…although most people won’t get a chance to actually hear those in person.
  - Nition 4y ago
    Piano too if there is one. The fundamental frequency of the low A is 27.5Hz. A Bosendorfer Imperial grand piano goes down to C0, 16.4Hz. If there's a pipe organ with 64' pipes you can hit 8Hz. Not many of those though.
    - aidenn0 4y ago
      Plenty of organs go below 20Hz though, and even an otherwise good sound system starts to struggle around 40Hz if it's not built specifically for playing such notes.
    - Blackthorn 4y ago
      Dumb question but how is the piano capable of generating these frequencies? I thought the strings couldn't get nearly long enough and the low frequencies that you heard from piano were just psychoacoustics.
      - quercusa 4y ago
        The bass strings are wound with copper wire so that the mass is much higher and the resonant frequency much lower.
        deleted 4y ago
        [deleted]
      - Nition 4y ago
        The amount of space needed for a certain frequency in air is different to the length needed for that same frequency in a wire. It might help to see the formula, which is: Frequency = sqrt(tension/(mass / length)) / (2 * length) So length, tension, and mass are all factors. Modern upright pianos also string the bass strings diagonally to give them a bit of extra length. Having said all that, the same bass notes on longer pianos that can fit longer strings sound more sonorous. I'm not sure exactly why that is. For an extreme example see for instance the Alexander Piano[0], or the Klavins 370[1]. [0] https://youtu.be/PcP8UMgsmFo?t=132 https://youtu.be/PcP8UMgsmFo?t=132 [1] https://www.youtube.com/watch?v=LPGw-Va5xPU https://www.youtube.com/watch?v=LPGw-Va5xPU
- crazygringo 4y ago
  I'd say timpani drums, tubas, largest/lowest pipes on an organ (if the hall has one), and double bass. Contrabassoon, the lowest notes of a piano. Other percussion like a gong. Basically, by necessity, whatever the largest instruments are in diameter or length. And then it's all being amplified by some mutual resonance with each other and possibly other physical structures like the floor.
winternett 4y ago
As a music producer I've been ranting for a while now about how a lot of modern music cuts low end out in order to be louder on mobile devices and on streaming services like Spotify... It's also been reported that the algorithms on sites like Spotify favor music that has less low end on it (especially pop songs), which only encourages this trend of loudness. I've found that sub frequencies are also a good anchor for preventing music from being turned up too loud into areas where ear damage occurs... At live events in the past I've frequently had to wear ear plugs (or rolled up tissues in my ears if I forgot plugs) in order to protect my hearing from the trend of louder music composition. In all of our music, I usually tune low end frequencies to create bass pressure that can only be felt on excellent sound systems, this is also likely why our spotify stream numbers have been low for years now, despite us doing well in places like audiomack and YouTube (where bass music aficionados are more likely to go for music...
6stringmerc 4y ago
I've long wondered about skipping the speaker and just going for a method to create long-waves to vibrate everyday environments. In sync after tuning it could be like a 360 earthquake internally. If it works for microphones to catch radiant sound (as I learned in on-set film production) then it probably works the other way too (as I learned when in the booth watching a DJ friend plugged his headphones into the mic jack and used one earpiece to talk to the crowd).
- bayindirh 4y ago
  You’re looking for rotary subwoofers [0]. They vibrate the whole room. [0]: https://en.m.wikipedia.org/wiki/Rotary_woofer https://en.m.wikipedia.org/wiki/Rotary_woofer
atoav 4y ago
The issue with those ultra-deep frequencies is that the waves become really long and the acoustics to make them behave become increasingly unwieldy the lower you go. Dampening a the 9.8 meter long wave of a 35 Hz tone is already hard, dampening a ~19 meter long 18Hz wave mist be pretty much impossible. The only thing more amazing than loud low bass is bone dry loud low bass that starts and stops precisely.
- JohnBooty 4y ago
  The only thing more amazing than loud low bass is bone dry loud low bass Bone dry sounds awesome. My frustration with rock venues is that there's usually lots of bass, but it's super sloppy. Everything below ~80hz sounds like a giant audio sludgeball. I feel like even a little bit of tuning and room correction (the sort one can do at home with freeware and a $89 calibrated microphone) would help tremendously, but there's no appetite for that on the part of concertgoers or sound techs. I'm glad there are dance venues getting this right.
  - _carbyau_ 4y ago
    That sounds like something I could do for my own loungeroom. I mean, I have no fancy gear but it seems like a process to make the best of what I have. For the cost of a decent microphone it could be worth it.
    - JohnBooty 4y ago
      The gist of it is: - get a calibrated mic - use REW (Room EQ Wizard, free) to take several measurements in your room, in the listening area(s) - REW will average them and generate an inverse EQ curve to compensate - you can export the parametric EQ settings and use them anywhere that supports parameteric EQ such as EqualizerAPO (windows, free) or CoreAudio parametric EQ units (Mac, free) or in a standalone hardware device like the MiniDSP (~$100 IIRC) you can always tweak the parametric EQ curve to suit your personal taste, like some extra bass or extra treble to compensate for aging ears (like mine) have fun and good luck!
baus 4y ago
I'm running a 30" woofer in a ~2120L sealed enclosure. Changed the way I hear music.
- kube-system 4y ago
  ... a sub the size of cube 128cm along one edge? nice.
clolege 4y ago
Where do you get your recordings from? It bums me out that most music recording and reproduction equipment drop off drastically outside 20-20,000hz. I wish that we could open that range up a bit more, the low end for haptics and the high end for the other beings in our house that can hear in that range (dogs, cats, etc) The new amplifiers from Purifi are incredible when it comes to delivering a flat response to 0hz, at high power into complex loads. I’m curious to see if I’ll be able to tell a difference in how their amps coupled with their new power supplies drive my ButtKickers :)
- seiferteric 4y ago
  I wonder if you could just transpose the lower end, say 20-30 hz down to the 10-20 hz range since you can't hear them anyway so it won't sound bad, but you would "feel" it.
  - clolege 4y ago
    That’s what subharmonic generators do and I’ve heard mixed reviews. Like, if you were to take the bottom octave of a piano pieces and replicate it on the next octave down, it could easily sound like crap. Might sound decent for some songs though?
- bob1029 4y ago
  I've got a lot of classical SACD and DSD recordings from many moons ago that were mastered very well. You are right that you need to pay attention to the entire signal chain. A bad DSP or DAC somewhere in the middle will make your quarter ton of LFE completely worthless.
  - archi42 4y ago
    It's not even necessity a "bad" device. Sometimes circuit designers add a DC blocking capacitor on an input to avoid damage to the equipment (especially in an high powered analog amp you might want to avoid feeding DC into the speaker). The digital domain is much more forgiving; reason why I preach going all-digital up until I2S into the class-d amp IC :) (No, I don't do that at home due to lack of available equipment - I'm still fully analog after the DSP/DAC combo).
modzu 4y ago
I'll just leave this here: https://en.m.wikipedia.org/wiki/Brown_note https://en.m.wikipedia.org/wiki/Brown_note
jvm___ 4y ago
This explains why the scene in Jurassic park never lives up to the expectations of watching it in my friend's home theater when I was a kid.
- deleted 4y ago
  [deleted]
leobg 4y ago
> Being able to "feel" the original auditorium in your listening room is a very cool effect to me. What do I need to buy to have this in my car?
- bob1029 4y ago
  Your car likely does not have enough volume to accommodate the required equipment. Just one of these subwoofers occupies the entire bed of a typical pickup truck. Two of these are used in my listening space. The lower the loudspeaker goes, the bigger it needs to be.
  - squarefoot 4y ago
    You can at least partially trade width with depth, that is, making a speaker narrower but design it so that the cone can travel farther and move the same air volume, but it also have drawbacks, and thicker speakers are also harder to accomodate.
  - aidenn0 4y ago
    The smaller the volume of air you need to move, the less this matters (which is why IEMs have more bass than tiny bookshelf speakers, despite being way smaller. It should be theoretically possible to do just replace the trunk and backseat of a saloon and have a 2 seater with good bass extension
    - fshbbdssbbgdd 4y ago
      I think we are taking about the bass shaking your chest. IEMs can’t do that.
      - aidenn0 4y ago
        IEMs can develop high pressures at low frequencies because the volume of air they are moving is very small. A compact car with the windows rolled up here is analagous to the ear canal in the IEM. If 50% of the internal space of the car is speakers (easily achievable if you remove the backseats and use the trunk space), then you ought to be able to generate large pressures at low frequencies as long as the windows are rolled up.
ravedave5 4y ago
Rocket launches must have so much of these frequencies. Being at one was nothing like I expected after listening to the audio of launches on normal devices.
- Melting_Harps 4y ago
  > Rocket launches must have so much of these frequencies. Being at one was nothing like I expected after listening to the audio of launches on normal devices. Agreed, I've been to lots of clubs and listened to heavy bass music most of my adult life. Launches are still indescribable and it just put an instant smile on my face and still gives me goosebumps after all these years as I wasn't even that close to the launch site (bluffs about 10 miles away): I saw the Falcon 9 launch at Vandenburg that made people think the aliens arrived [0]. 0: https://www.youtube.com/watch?v=UVi01wACopc https://www.youtube.com/watch?v=UVi01wACopc
rrrrrrrrrrrryan 4y ago
I'm perhaps dating myself a bit, but I remember being caught off guard the first time I walked onto the dancefloor at Fabric (a famous nightclub in London). They'd put mechanical transducers under the floorboards and hooked them up to the audio feed, effectively turning the entire dancefloor into one giant subwoofer. [1] It was absolutely a gimmick, but a tremendously well-executed one. Being literally lifted a few millimeters into the air when the bass dropped was such a visceral experience that I'm still surprised it wasn't widely copied in other venues. [1] https://youtu.be/ijwxsIV8Iac?t=100 https://youtu.be/ijwxsIV8Iac?t=100
- brigandish 4y ago
  It wasn't so good for drum and bass, there's so much bass already that it used to turn the bass sound into a mushy mess, if you ask me.
- crmd 4y ago
  The first time I ever took MDMA was in Fabric many years ago. John Digweed was playing. I will never forget the sound and the feeling of that dance floor.
  - contingencies 4y ago
    ~2010 worked in Farringdon and this was our local club. Went in Fridays after the pub. Once took a holiday to cycle tour Romania, ran in to Romania's most famous DJ in a ski resort, and he told me his dream was to play there. Almost choked on my beer...
    - tbalsam 4y ago
      Well? Did he? :D
- pvarangot 4y ago
  You can get a similar effect with a floating or semi-floating floor and a huge sub hanging from the ceiling. You have to tune it though. If you are on the Bay Area, The Great Northern had a setup like that on the hallway at the entrance before the main floor. They use VOID for their soundsystem but I don't think that particular part of the setup is COTS.
nomel 4y ago
Let me introduce you to...the buttkicker: https://thebuttkicker.com https://thebuttkicker.com
- squarefoot 4y ago
  Interesting. They also have flight simulation among the applications, which made me recall an old family friend who was a passenger airline pilot during the 70s and 80s. He also played a bit with older Flight Simulator versions, and one time he commented "yeah, it's very accurate but it can't be the real thing: you don't just pilot with the instruments, you also need to feel the airplane with your ass".
  - kube-system 4y ago
    That's not just vibration but also (and maybe more significantly) G forces.
    - deleted 4y ago
      [deleted]
    - nomel 4y ago
      Need a butt swinger for that: https://www.youtube.com/watch?v=KW-ONbO5NYU https://www.youtube.com/watch?v=KW-ONbO5NYU
  - squeaky-clean 4y ago
    They're pretty common in more expensive sim-racing rigs too. I wish I could add some to mine, but I've read online that it will be perceptible to the downstairs neighbors without a lot of floor damping.
- js2 4y ago
  Child’s play. Let me introduce you to the BOSS platform: https://www.avsforum.com/threads/the-hideaway-theater.2991522/post-57535150 https://www.avsforum.com/threads/the-hideaway-theater.299152... HT enthusiasts are crazy about this stuff: https://www.avsforum.com/threads/the-tactile-response-thread-for-bass.3081780/ https://www.avsforum.com/threads/the-tactile-response-thread... Eight 18” subwoofers in the demo video at the start of this thread, and that’s one of the smaller setups. https://www.avsforum.com/threads/show-us-your-tactile-bass-capability.3251424/ https://www.avsforum.com/threads/show-us-your-tactile-bass-c... Here’s what 6 hz looks like from a video from that thread. https://www.youtube.com/watch?v=agSaMJ_H7VE https://www.youtube.com/watch?v=agSaMJ_H7VE

dehrmann 4y ago

> Classical music performed in large concert halls is one surprising candidate Dumb question: what's emitting these frequencies in an orchestra?

elmomle 4y ago
I imagine it's the space itself resonating more than anything else, being excited by higher-frequency harmonics.
WorkerBee28474 4y ago
Instruments that play <= 40Hz (E1) include double bass (either standard or with C extension), bass clarinet, and contrabass clarinet. Percussion also generates frequencies under 40Hz.
- mrob 4y ago
  And percussion generates sharp transients, which require frequencies below the steady-state fundamental frequency to be reproduced accurately: https://en.wikipedia.org/wiki/Uncertainty_principle#Signal_processing https://en.wikipedia.org/wiki/Uncertainty_principle#Signal_p...
- mechanical_bear 4y ago
  Also octobasse and subcontrabass saxophone…although most people won’t get a chance to actually hear those in person.
- Nition 4y ago
  Piano too if there is one. The fundamental frequency of the low A is 27.5Hz. A Bosendorfer Imperial grand piano goes down to C0, 16.4Hz. If there's a pipe organ with 64' pipes you can hit 8Hz. Not many of those though.
  - aidenn0 4y ago
    Plenty of organs go below 20Hz though, and even an otherwise good sound system starts to struggle around 40Hz if it's not built specifically for playing such notes.
  - Blackthorn 4y ago
    Dumb question but how is the piano capable of generating these frequencies? I thought the strings couldn't get nearly long enough and the low frequencies that you heard from piano were just psychoacoustics.
    - quercusa 4y ago
      The bass strings are wound with copper wire so that the mass is much higher and the resonant frequency much lower.
      - deleted 4y ago
        [deleted]
    - Nition 4y ago
      The amount of space needed for a certain frequency in air is different to the length needed for that same frequency in a wire. It might help to see the formula, which is: Frequency = sqrt(tension/(mass / length)) / (2 * length) So length, tension, and mass are all factors. Modern upright pianos also string the bass strings diagonally to give them a bit of extra length. Having said all that, the same bass notes on longer pianos that can fit longer strings sound more sonorous. I'm not sure exactly why that is. For an extreme example see for instance the Alexander Piano[0], or the Klavins 370[1]. [0] https://youtu.be/PcP8UMgsmFo?t=132 https://youtu.be/PcP8UMgsmFo?t=132 [1] https://www.youtube.com/watch?v=LPGw-Va5xPU https://www.youtube.com/watch?v=LPGw-Va5xPU
crazygringo 4y ago
I'd say timpani drums, tubas, largest/lowest pipes on an organ (if the hall has one), and double bass. Contrabassoon, the lowest notes of a piano. Other percussion like a gong. Basically, by necessity, whatever the largest instruments are in diameter or length. And then it's all being amplified by some mutual resonance with each other and possibly other physical structures like the floor.

winternett 4y ago

As a music producer I've been ranting for a while now about how a lot of modern music cuts low end out in order to be louder on mobile devices and on streaming services like Spotify... It's also been reported that the algorithms on sites like Spotify favor music that has less low end on it (especially pop songs), which only encourages this trend of loudness. I've found that sub frequencies are also a good anchor for preventing music from being turned up too loud into areas where ear damage occurs... At live events in the past I've frequently had to wear ear plugs (or rolled up tissues in my ears if I forgot plugs) in order to protect my hearing from the trend of louder music composition. In all of our music, I usually tune low end frequencies to create bass pressure that can only be felt on excellent sound systems, this is also likely why our spotify stream numbers have been low for years now, despite us doing well in places like audiomack and YouTube (where bass music aficionados are more likely to go for music...

6stringmerc 4y ago

I've long wondered about skipping the speaker and just going for a method to create long-waves to vibrate everyday environments. In sync after tuning it could be like a 360 earthquake internally. If it works for microphones to catch radiant sound (as I learned in on-set film production) then it probably works the other way too (as I learned when in the booth watching a DJ friend plugged his headphones into the mic jack and used one earpiece to talk to the crowd).

bayindirh 4y ago
You’re looking for rotary subwoofers [0]. They vibrate the whole room. [0]: https://en.m.wikipedia.org/wiki/Rotary_woofer https://en.m.wikipedia.org/wiki/Rotary_woofer

atoav 4y ago

The issue with those ultra-deep frequencies is that the waves become really long and the acoustics to make them behave become increasingly unwieldy the lower you go. Dampening a the 9.8 meter long wave of a 35 Hz tone is already hard, dampening a ~19 meter long 18Hz wave mist be pretty much impossible. The only thing more amazing than loud low bass is bone dry loud low bass that starts and stops precisely.

JohnBooty 4y ago
The only thing more amazing than loud low bass is bone dry loud low bass Bone dry sounds awesome. My frustration with rock venues is that there's usually lots of bass, but it's super sloppy. Everything below ~80hz sounds like a giant audio sludgeball. I feel like even a little bit of tuning and room correction (the sort one can do at home with freeware and a $89 calibrated microphone) would help tremendously, but there's no appetite for that on the part of concertgoers or sound techs. I'm glad there are dance venues getting this right.
- _carbyau_ 4y ago
  That sounds like something I could do for my own loungeroom. I mean, I have no fancy gear but it seems like a process to make the best of what I have. For the cost of a decent microphone it could be worth it.
  - JohnBooty 4y ago
    The gist of it is: - get a calibrated mic - use REW (Room EQ Wizard, free) to take several measurements in your room, in the listening area(s) - REW will average them and generate an inverse EQ curve to compensate - you can export the parametric EQ settings and use them anywhere that supports parameteric EQ such as EqualizerAPO (windows, free) or CoreAudio parametric EQ units (Mac, free) or in a standalone hardware device like the MiniDSP (~$100 IIRC) you can always tweak the parametric EQ curve to suit your personal taste, like some extra bass or extra treble to compensate for aging ears (like mine) have fun and good luck!

baus 4y ago

I'm running a 30" woofer in a ~2120L sealed enclosure. Changed the way I hear music.

kube-system 4y ago
... a sub the size of cube 128cm along one edge? nice.

clolege 4y ago

Where do you get your recordings from? It bums me out that most music recording and reproduction equipment drop off drastically outside 20-20,000hz. I wish that we could open that range up a bit more, the low end for haptics and the high end for the other beings in our house that can hear in that range (dogs, cats, etc) The new amplifiers from Purifi are incredible when it comes to delivering a flat response to 0hz, at high power into complex loads. I’m curious to see if I’ll be able to tell a difference in how their amps coupled with their new power supplies drive my ButtKickers :)

seiferteric 4y ago
I wonder if you could just transpose the lower end, say 20-30 hz down to the 10-20 hz range since you can't hear them anyway so it won't sound bad, but you would "feel" it.
- clolege 4y ago
  That’s what subharmonic generators do and I’ve heard mixed reviews. Like, if you were to take the bottom octave of a piano pieces and replicate it on the next octave down, it could easily sound like crap. Might sound decent for some songs though?
bob1029 4y ago
I've got a lot of classical SACD and DSD recordings from many moons ago that were mastered very well. You are right that you need to pay attention to the entire signal chain. A bad DSP or DAC somewhere in the middle will make your quarter ton of LFE completely worthless.
- archi42 4y ago
  It's not even necessity a "bad" device. Sometimes circuit designers add a DC blocking capacitor on an input to avoid damage to the equipment (especially in an high powered analog amp you might want to avoid feeding DC into the speaker). The digital domain is much more forgiving; reason why I preach going all-digital up until I2S into the class-d amp IC :) (No, I don't do that at home due to lack of available equipment - I'm still fully analog after the DSP/DAC combo).

modzu 4y ago

I'll just leave this here: https://en.m.wikipedia.org/wiki/Brown_note https://en.m.wikipedia.org/wiki/Brown_note

jvm___ 4y ago

This explains why the scene in Jurassic park never lives up to the expectations of watching it in my friend's home theater when I was a kid.

deleted 4y ago
[deleted]

leobg 4y ago

> Being able to "feel" the original auditorium in your listening room is a very cool effect to me. What do I need to buy to have this in my car?

bob1029 4y ago
Your car likely does not have enough volume to accommodate the required equipment. Just one of these subwoofers occupies the entire bed of a typical pickup truck. Two of these are used in my listening space. The lower the loudspeaker goes, the bigger it needs to be.
- squarefoot 4y ago
  You can at least partially trade width with depth, that is, making a speaker narrower but design it so that the cone can travel farther and move the same air volume, but it also have drawbacks, and thicker speakers are also harder to accomodate.
- aidenn0 4y ago
  The smaller the volume of air you need to move, the less this matters (which is why IEMs have more bass than tiny bookshelf speakers, despite being way smaller. It should be theoretically possible to do just replace the trunk and backseat of a saloon and have a 2 seater with good bass extension
  - fshbbdssbbgdd 4y ago
    I think we are taking about the bass shaking your chest. IEMs can’t do that.
    - aidenn0 4y ago
      IEMs can develop high pressures at low frequencies because the volume of air they are moving is very small. A compact car with the windows rolled up here is analagous to the ear canal in the IEM. If 50% of the internal space of the car is speakers (easily achievable if you remove the backseats and use the trunk space), then you ought to be able to generate large pressures at low frequencies as long as the windows are rolled up.

ravedave5 4y ago

Rocket launches must have so much of these frequencies. Being at one was nothing like I expected after listening to the audio of launches on normal devices.

Melting_Harps 4y ago
> Rocket launches must have so much of these frequencies. Being at one was nothing like I expected after listening to the audio of launches on normal devices. Agreed, I've been to lots of clubs and listened to heavy bass music most of my adult life. Launches are still indescribable and it just put an instant smile on my face and still gives me goosebumps after all these years as I wasn't even that close to the launch site (bluffs about 10 miles away): I saw the Falcon 9 launch at Vandenburg that made people think the aliens arrived [0]. 0: https://www.youtube.com/watch?v=UVi01wACopc https://www.youtube.com/watch?v=UVi01wACopc

rrrrrrrrrrrryan 4y ago

I'm perhaps dating myself a bit, but I remember being caught off guard the first time I walked onto the dancefloor at Fabric (a famous nightclub in London). They'd put mechanical transducers under the floorboards and hooked them up to the audio feed, effectively turning the entire dancefloor into one giant subwoofer. [1] It was absolutely a gimmick, but a tremendously well-executed one. Being literally lifted a few millimeters into the air when the bass dropped was such a visceral experience that I'm still surprised it wasn't widely copied in other venues. [1] https://youtu.be/ijwxsIV8Iac?t=100 https://youtu.be/ijwxsIV8Iac?t=100

brigandish 4y ago
It wasn't so good for drum and bass, there's so much bass already that it used to turn the bass sound into a mushy mess, if you ask me.
crmd 4y ago
The first time I ever took MDMA was in Fabric many years ago. John Digweed was playing. I will never forget the sound and the feeling of that dance floor.
- contingencies 4y ago
  ~2010 worked in Farringdon and this was our local club. Went in Fridays after the pub. Once took a holiday to cycle tour Romania, ran in to Romania's most famous DJ in a ski resort, and he told me his dream was to play there. Almost choked on my beer...
  - tbalsam 4y ago
    Well? Did he? :D
pvarangot 4y ago
You can get a similar effect with a floating or semi-floating floor and a huge sub hanging from the ceiling. You have to tune it though. If you are on the Bay Area, The Great Northern had a setup like that on the hallway at the entrance before the main floor. They use VOID for their soundsystem but I don't think that particular part of the setup is COTS.

nomel 4y ago

Let me introduce you to...the buttkicker: https://thebuttkicker.com https://thebuttkicker.com

squarefoot 4y ago
Interesting. They also have flight simulation among the applications, which made me recall an old family friend who was a passenger airline pilot during the 70s and 80s. He also played a bit with older Flight Simulator versions, and one time he commented "yeah, it's very accurate but it can't be the real thing: you don't just pilot with the instruments, you also need to feel the airplane with your ass".
- kube-system 4y ago
  That's not just vibration but also (and maybe more significantly) G forces.
  - deleted 4y ago
    [deleted]
  - nomel 4y ago
    Need a butt swinger for that: https://www.youtube.com/watch?v=KW-ONbO5NYU https://www.youtube.com/watch?v=KW-ONbO5NYU
- squeaky-clean 4y ago
  They're pretty common in more expensive sim-racing rigs too. I wish I could add some to mine, but I've read online that it will be perceptible to the downstairs neighbors without a lot of floor damping.
js2 4y ago
Child’s play. Let me introduce you to the BOSS platform: https://www.avsforum.com/threads/the-hideaway-theater.2991522/post-57535150 https://www.avsforum.com/threads/the-hideaway-theater.299152... HT enthusiasts are crazy about this stuff: https://www.avsforum.com/threads/the-tactile-response-thread-for-bass.3081780/ https://www.avsforum.com/threads/the-tactile-response-thread... Eight 18” subwoofers in the demo video at the start of this thread, and that’s one of the smaller setups. https://www.avsforum.com/threads/show-us-your-tactile-bass-capability.3251424/ https://www.avsforum.com/threads/show-us-your-tactile-bass-c... Here’s what 6 hz looks like from a video from that thread. https://www.youtube.com/watch?v=agSaMJ_H7VE https://www.youtube.com/watch?v=agSaMJ_H7VE