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Topic: noise cancellation headphones (Read 4727 times) previous topic - next topic

i want to make active noise cancelling headphones my generating destructive sound. is this even possible with an arduino? if it is, how would i go about doing this?
thanks!

Magician

IMHO, arduino isn't up to. Ether completely analog or digital version, first one doesn't require MCU, and you only need bunch OPA, second one need more processing power than arduino could afford.


retrolefty

As the raw input and output for this kind of application is analog, the AVR micro-controller is just the wrong tech to use. Dsp equipped processor chips would be a better match for this kind of application.

http://en.wikipedia.org/wiki/Digital_signal_processor

Lefty

CrossRoads

How about checking these out?

http://www.headsetsinc.com/

I put these in the headphones in my plane.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

NiHaoMike

You can get a very impressive amount of noise reduction with just passive means. Much easier than dealing with DSP. I just use a pair of JVC HA-FX34s with the foam pieces replaced with ear plugs with a hole drilled in them.

An easy way is to just crank up the volume and use earplugs to get it back down to a comfortable level. It would almost certainly use less power than a DSP unless there's already one in your application. A cheap pair of earplugs would give 29dB of SNR improvement, probably more than you need.
"Optiboot: the Tiffany Yep of Arduino bootloaders."

CrossRoads

Passive doesn't dampen the effect of deeper bass rumble, like from an engine. Active is much better for that.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


How about checking these out?

http://www.headsetsinc.com/

I put these in the headphones in my plane.


WOW... you have a plane?
Eu não sou o teu criado. Se respondo no fórum é para ajudar todos mediante a minha disponibilidade e disposição. Responder por mensagem pessoal iria contra o propósito do fórum e por isso evito-o.
Se realmente pretendes que eu te ajude por mensagem pessoal, então podemos chegar a um acordo e contrato onde me pagas pela ajuda que eu fornecer e poderás então definir os termos de confidencialidade do meu serviço. De forma contrária toda e qualquer ajuda que eu der tem de ser visível a todos os participantes do fórum (será boa ideia, veres o significado da palavra fórum).
Nota também que eu não me responsabilizo por parvoíces escritas neste espaço pelo que se vais seguir algo dito por mim, entende que o farás por tua conta e risco.

Dito isto, mensagens pessoais só se forem pessoais, ou seja, se já interagimos de alguma forma no passado ou se me pretendes convidar para uma churrascada com cerveja (paga por ti, obviamente).

CrossRoads

Yes. Others have a boat. Or drive very expensive cars.  I bought a plane instead.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

justjed


Yes. Others have a boat. Or drive very expensive cars.  I bought a plane instead.


I have several planes. This is the nicest one.

But a Mooney would be fun. Or a personal gyrocopter.
... it is poor civic hygiene to install technologies that could someday
facilitate a police state. -- Bruce Schneier


As the raw input and output for this kind of application is analog, the AVR micro-controller is just the wrong tech to use. Dsp equipped processor chips would be a better match for this kind of application.


where would i cheaply get one of these?

retrolefty



As the raw input and output for this kind of application is analog, the AVR micro-controller is just the wrong tech to use. Dsp equipped processor chips would be a better match for this kind of application.


where would i cheaply get one of these?


http://ww1.microchip.com/downloads/en/DeviceDoc/70324d.pdf

This brochure list 'noise cancellation' application information avalible, so search around their site.

CrossRoads

The link I posted earlier is for $170 or so for two boards that do noise cancelling, one for each ear, and work quite well.
Find apair of Peltor hearing protectors and mount them in it.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

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