Vibrating curtains for sound absorption

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Letitroll98

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Vibrating curtains for sound absorption
« on: 12 Jun 2024, 03:36 pm »
https://www.techradar.com/audio/vibrating-curtains-with-noise-cancelling-effects-may-be-the-future-of-your-hi-fi-room-or-home-theater

A vibrating thread as thin as silk can be used for noise cancelling curtains in audio rooms.

TRADERXFAN

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Re: Vibrating curtains for sound absorption
« Reply #1 on: 12 Jun 2024, 06:43 pm »
There is already the sub wall pitch/catch method... (forget the technical name... anyone remember?)
Where you have a rectangular room.

Place your woofers equidistant drivers on front wall. 2 4 etc...
Same mirror placement on back wall.

Calculate the time delay for speed of sound distance front to back.

Cancel with opposing signal.

No modes form... but no reverberations either. Pick your poison.

Scott Joplin

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Re: Vibrating curtains for sound absorption
« Reply #2 on: 12 Jun 2024, 07:18 pm »
There is already the sub wall pitch/catch method... (forget the technical name... anyone remember?)

Double Bass Array

Letitroll98

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Re: Vibrating curtains for sound absorption
« Reply #3 on: 14 Jun 2024, 10:02 am »
None of that is even close to the product linked to.

Zuman

Re: Vibrating curtains for sound absorption
« Reply #4 on: 14 Jun 2024, 12:56 pm »
In many real-world situations with audiophiles who care about their spouse, the notorious "WAF" is a limiting factor in room treatments. I think it would be very cool if this solution would become available in drape/curtain form and would be financially accessible to regular people!

TRADERXFAN

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Re: Vibrating curtains for sound absorption
« Reply #5 on: 14 Jun 2024, 05:24 pm »
None of that is even close to the product linked to.

"The first is the method Bose developed in the 1970s to help pilots land aircraft – and it's the solution used in all of the best noise-cancelling headphones on the market now. It involves the generation of an 'anti-phase' wave, passed through the vibrating fabric itself, to oppose the frequencies of the unwanted noise in the room and thus cancel it out."

"
Double Bass Array

Thats was it. thanks!

TRADERXFAN

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Re: Vibrating curtains for sound absorption
« Reply #6 on: 14 Jun 2024, 05:29 pm »
In many real-world situations with audiophiles who care about their spouse, the notorious "WAF" is a limiting factor in room treatments. I think it would be very cool if this solution would become available in drape/curtain form and would be financially accessible to regular people!

If the curtain is a tool to absorb (a lot of or all sound at nearly all frequencies  -  so that it does not reflect IN THE ROOM-- that may be at odds with what you would experience as"good sound" Thats why we don't want anechoic chambers for audio rooms.

If it is something you put around your room somehow to stop transmission INTO a different room-  in lieu of a better wall construction  - then maybe!




 

Letitroll98

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Re: Vibrating curtains for sound absorption
« Reply #7 on: 15 Jun 2024, 10:31 am »
If the curtain is a tool to absorb (a lot of or all sound at nearly all frequencies  -  so that it does not reflect IN THE ROOM-- that may be at odds with what you would experience as"good sound" Thats why we don't want anechoic chambers for audio rooms.

If it is something you put around your room somehow to stop transmission INTO a different room-  in lieu of a better wall construction  - then maybe!

One assumes the curtains wouldn't cover the entire wall surface, more like the window openings, leaving plenty of flat wall surface to provide some reflections and maintain a bit of reverberation.  It's all experimental now anyway.