Noise Canceling Headphone

[neophyte05]

      Today, 07:00 AM
Good day to everyone
im a newbie here
and i just want to ask on how to
make a Noise canceling Headphone
that is not too expensive
Im going to use it in my project

My project is to make a a hearing test device
that does not need an assistance of a specialist/doctor
Based on my research, doctors used a sound proof room
to avoid noise interference
and my idea is to make a headphone that can eliminate noise

I also want to ask if you know programs like MatLab
that produces a sound with an accurate frequency
that is not PC based and can be used without PC

I dont know if i could use a micro controller

[audioguru]

On the internet there are a few projects for noise cancelling headphones. They glue electret mics to the outside of each earphone and have an amplifier and mixer circuit to electronically cancel outside noise.

You need a hearing specialist (or common sense) to determine which frequencies are not sensitive enough for a deaf patient. Then you must program a circuit or design it so that it amplifies only some frequencies.

If you amplify some frequencies too much then you will destroy what remains of the hearing of a deaf person. 

[ARUN CHOWDARY]

i think by using microphone which are more sensitive for the human voice and by using the band pass filters which are designed for certain human frequencies that the noise frequencies are destroyed