5 ms·

YES. I was thinking the same thing. The last building I was in was converted from an old industrial space. There were noise cancelling devices in the ceiling. Y

YES. I was thinking the same thing. The last building I was in was converted from an old industrial space. There were noise cancelling devices in the ceiling. You couldn't hear the person sitting across the table from you.

apinstein 12y ago
Noise canceling? Got a link? I am aware of white noise machines but not noise-canceling. Presently building out a new office and would love to see details.
- JohnBooty 12y ago
  I'm not an acoustical engineer but my understanding is that noise canceling devices are usually passive - think of the oddly shaped foam panels you see in recording studios: https://www.google.com/search?q=anechoic+chamber&source=lnms&tbm=isch&sa=X&ei=TQ4aVcnfLcmWgwSEn4TYDg&ved=0CAcQ_AUoAQ&biw=947&bih=975#tbm=isch&q=recording+studio+acoustic+treatment https://www.google.com/search?q=anechoic+chamber&source=lnms... Or, in an extreme example, the ones you see in anechoic chambers: https://www.google.com/search?q=anechoic+chamber&source=lnms&tbm=isch&sa=X&ei=TQ4aVcnfLcmWgwSEn4TYDg&ved=0CAcQ_AUoAQ&biw=947&bih=975 https://www.google.com/search?q=anechoic+chamber&source=lnms... The foam devices serve to both absorb sound energy, and to scatter the remaining sound energy at a variety of angles, where much of it will collide with other reflected sound waves and cancel out. I needed some acoustic foam for a small project at home and found this place. They seemed pretty affordable (and had lots of colors) compared to other places, though I'm far from an expert and I was only buying ~$40 of foam so I didn't exactly spent too much time comparison shopping: http://www.foambymail.com/acoustical-foam-products.html http://www.foambymail.com/acoustical-foam-products.html
- staticfish 12y ago
  I'm pretty certain he means noise dampening, and you knew that.
  - apinstein 12y ago
    I truly didn't; the use of the word "device" and the word "canceling" hints at something active. I've not heard of foam before referred to as a "device".

apinstein 12y ago

Noise canceling? Got a link? I am aware of white noise machines but not noise-canceling. Presently building out a new office and would love to see details.

JohnBooty 12y ago
I'm not an acoustical engineer but my understanding is that noise canceling devices are usually passive - think of the oddly shaped foam panels you see in recording studios: https://www.google.com/search?q=anechoic+chamber&source=lnms&tbm=isch&sa=X&ei=TQ4aVcnfLcmWgwSEn4TYDg&ved=0CAcQ_AUoAQ&biw=947&bih=975#tbm=isch&q=recording+studio+acoustic+treatment https://www.google.com/search?q=anechoic+chamber&source=lnms... Or, in an extreme example, the ones you see in anechoic chambers: https://www.google.com/search?q=anechoic+chamber&source=lnms&tbm=isch&sa=X&ei=TQ4aVcnfLcmWgwSEn4TYDg&ved=0CAcQ_AUoAQ&biw=947&bih=975 https://www.google.com/search?q=anechoic+chamber&source=lnms... The foam devices serve to both absorb sound energy, and to scatter the remaining sound energy at a variety of angles, where much of it will collide with other reflected sound waves and cancel out. I needed some acoustic foam for a small project at home and found this place. They seemed pretty affordable (and had lots of colors) compared to other places, though I'm far from an expert and I was only buying ~$40 of foam so I didn't exactly spent too much time comparison shopping: http://www.foambymail.com/acoustical-foam-products.html http://www.foambymail.com/acoustical-foam-products.html
staticfish 12y ago
I'm pretty certain he means noise dampening, and you knew that.
- apinstein 12y ago
  I truly didn't; the use of the word "device" and the word "canceling" hints at something active. I've not heard of foam before referred to as a "device".