Difference between original sound and microphone recorded sound

Hi,

I was wondering if anyone can formalize the difference between a played audio buffer and the same audio buffer, played from a speaker and captured by a microphone.

For example, if I take the original buffer and the captured buffer and run on both FFT, would the result look the same? what is the expected difference between the two? how can I know it's the same content?

Can anyone recommend a noise reduction function that would do this best for the matching purpose? should I even use one, or is there a test in which the noise would be eliminated?

Thanks Start a New Thread

Hi ,

Surely there will be difference in the contents as the captured content with
micro phone would have been modified with Transfer functions of Speker &
Micro phone.
Incase if these transfer functions are flat in freq domain ( ideal case and
may not be possible in real-time scenarios ) then these 2 datas might be
same.

Noise reduction - depends on the source of the noise ( spkr , mike , place
etc.. ).

Thanks&Regards,
Sada.

--------

From: a... [mailto:a...] On Behalf
Of k...@gmail.com
Sent: Monday, December 07, 2009 2:04 PM
To: a...
Subject: [audiodsp] Difference between original sound and microphone
recorded sound

Hi,

I was wondering if anyone can formalize the difference between a played
audio buffer and the same audio buffer, played from a speaker and captured
by a microphone.

For example, if I take the original buffer and the captured buffer and run
on both FFT, would the result look the same? what is the expected difference
between the two? how can I know it's the same content?

Can anyone recommend a noise reduction function that would do this best for
the matching purpose? should I even use one, or is there a test in which the
noise would be eliminated?

Thanks Start a New Thread