4 ms·

I'll wait for the 3rd party benchmarks.

by ken47 6y ago

jeffbee 6y ago
Even the first-party benchmarks look pretty trashy. +20dB peaks at 2k and 10k? "A bit bright" might understate things. I suppose they intend to equalize this away with some kind of integrated DSP? https://images.anandtech.com/doci/15894/xMEMS%20Montara%20PR%2020062618.png https://images.anandtech.com/doci/15894/xMEMS%20Montara%20PR...
- entropicdrifter 6y ago
  It's honestly very easy to counteract big peaks like those at such high frequencies, especially when you can virtually guarantee that every single driver will have essentially identical frequency response curves
  - jeffbee 6y ago
    Sure, especially if you control the whole package (like a bluetooth headphone would) and double especially if you can rely on your source material having zero spectral content above 15k (many streaming music formats) or even lower (phone calls). But a 20dB cut is pretty dramatic. I use a 5-band parametric DSP with my headphones and it is only capable of 12dB cuts.
    - wtallis 6y ago
      It sounds like "controlling the whole package" is already a foregone conclusion, given the requirement for a fairly non-standard amplifier.
    - nitrogen 6y ago
      -20dB is a multiplication by 10%. Not difficult to implement, but usually not available on manually controlled EQs unless you stack two bands. I haven't actually confirmed this with testing yet, but won't those resonances still increase decay time at those frequencies after equalization? I'd like to see post-EQ waterfall plots.
    - Espressosaurus 6y ago
      I would expect it to be a straightforward signal processing problem if all that's needed is 20dB of suppression across a relatively narrow frequency range. If the frequency response is consistent from MEMS to MEMS, it should be straightforward to simply create a model, invert it, and apply it to the incoming waveform. DSPs these days can be pretty tiny and power efficient so I bet it wouldn't even take up too much power and area to do something like that.
- grandinj 6y ago
  probably a combination of DSP and deliberate peaks and troughs in the chamber design.

I'll wait for the 3rd party benchmarks.

by ken47 6y ago

I'll wait for the 3rd party benchmarks.

Even the first-party benchmarks look pretty trashy. +20dB peaks at 2k and 10k? "A bit bright" might understate things. I suppose they intend to equalize this away with some kind of integrated DSP? https://images.anandtech.com/doci/15894/xMEMS%20Montara%20PR%2020062618.png https://images.anandtech.com/doci/15894/xMEMS%20Montara%20PR...

entropicdrifter 6y ago
It's honestly very easy to counteract big peaks like those at such high frequencies, especially when you can virtually guarantee that every single driver will have essentially identical frequency response curves
- jeffbee 6y ago
  Sure, especially if you control the whole package (like a bluetooth headphone would) and double especially if you can rely on your source material having zero spectral content above 15k (many streaming music formats) or even lower (phone calls). But a 20dB cut is pretty dramatic. I use a 5-band parametric DSP with my headphones and it is only capable of 12dB cuts.
  - wtallis 6y ago
    It sounds like "controlling the whole package" is already a foregone conclusion, given the requirement for a fairly non-standard amplifier.
  - nitrogen 6y ago
    -20dB is a multiplication by 10%. Not difficult to implement, but usually not available on manually controlled EQs unless you stack two bands. I haven't actually confirmed this with testing yet, but won't those resonances still increase decay time at those frequencies after equalization? I'd like to see post-EQ waterfall plots.
  - Espressosaurus 6y ago
    I would expect it to be a straightforward signal processing problem if all that's needed is 20dB of suppression across a relatively narrow frequency range. If the frequency response is consistent from MEMS to MEMS, it should be straightforward to simply create a model, invert it, and apply it to the incoming waveform. DSPs these days can be pretty tiny and power efficient so I bet it wouldn't even take up too much power and area to do something like that.
grandinj 6y ago
probably a combination of DSP and deliberate peaks and troughs in the chamber design.