Greetings all,
I want to build a custom pair of noise cancelling headphones that will work with my mp3 player. The way they work is that you have a microphone which picks up external sounds and then sends it to an IC for processing, which then adds specially creating noise to drown out the environment. This is where I run into problems. All of the units I have seen on the market currently require battery power (usually 1 AAA) to operate. I was therefore wondering about the kind of power and signal that a standard 3.5 mm audio jack provides (specifically from an ipod or iphone), because I would like to design a system that relies on the audio port and uses minimal or even no battery power. Also, what kind of IC should I be looking at that will be powerful enough?
BTW, I have read **broken link removed** but its just too big and clunky for my needs.
Thanks in advance,
Allan
I want to build a custom pair of noise cancelling headphones that will work with my mp3 player. The way they work is that you have a microphone which picks up external sounds and then sends it to an IC for processing, which then adds specially creating noise to drown out the environment. This is where I run into problems. All of the units I have seen on the market currently require battery power (usually 1 AAA) to operate. I was therefore wondering about the kind of power and signal that a standard 3.5 mm audio jack provides (specifically from an ipod or iphone), because I would like to design a system that relies on the audio port and uses minimal or even no battery power. Also, what kind of IC should I be looking at that will be powerful enough?
BTW, I have read **broken link removed** but its just too big and clunky for my needs.
Thanks in advance,
Allan
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