On Wed, Oct 26, 2011 at 08:52:14AM -0500, Charles Henry wrote:
> > http://sdr-widget.googlecode.com/files/Draft4_Sound_card_noise_floor_compare_2010_07_25_TF3LJ.pdf
>
> This looks good to study--that analog board has great noise characteristics.
Yes. To get the full story you should also zoom in on the 0-500Hz range.
Noise density will rise in that range, and there will be mains frequency
harmonics leaking in.
Provided the noise density is flat in the audio range, the unweighted
S/N for 20 kHz bandwidth would be -(No + 43) dB, i.e. 114.8 dB for the
SDR Widget Lite Alpha2, which is quite good. For an A-weighted value
add 2.2 dB.
The best way to measure the actual noise level would be jnoisemeter.
Ciao,
-- FA _______________________________________________ Linux-audio-user mailing list Linux-audio-user@email-addr-hidden http://lists.linuxaudio.org/listinfo/linux-audio-userReceived on Wed Oct 26 20:15:02 2011
This archive was generated by hypermail 2.1.8 : Wed Oct 26 2011 - 20:15:02 EEST