Re: Difference between original sound and microphone recorded sound

I'm aware it's not the same buffer eventually. My question is whether
there's a simple test (FFT, or any kind of variant) that would make it easy
to test a segment and tell whether it's the same original data even if it
was recorded from the speaker by the microphone?

On Mon, Dec 7, 2009 at 3:37 PM, sada wrote:

> 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