On Mon, 26 Nov 2007, James Courtier-Dutton wrote: > Rene Herman wrote: >> On 25-11-07 04:18, Mark Constable wrote: >> >>> There are a few online hearing test sites around, here >>> is one with 16/44.1 wavs. I can't hear 12kHz-0dB.wav :-( >>> >>> http://www.phys.unsw.edu.au/music/dB/loudness.html >> >> Word of warning -- the outcome here will significantly vary with the used >> soundcard, headphones and ofcourse _very_ much with how loud you crank up >> any on- or off-card amplifier. >> >> And eat your heart out... >> >> That 16 kHz -60dB is just about my threshold with good headphones, good card >> set to 0 dB and external amplication cranked up. -57 I hear always, at -60 >> it's a little flaky. At those levels, 12-0dB actively hurts... >> >> Rene. >> > > Ears are funny things. > 16 kHz might be just about your limit, but if you listen to more than > one tone mixed together you will hear a difference. > E.g. > 16 kHz you can hardly hear. > 8 kHz you can hear, but
In the speakers that could be due to IM distortion. The ears are more difficult, because the sensors for 8 and 16KHz are at different places, so that the non-linear mixing is not as important. However 16K and 17K together will produce a 1K sound in your ears at appreciable levels. > 8 kHz mixed with 16 kHz will sound different from 8 kHz alone. > The real quality of a sound card and speakers comes with how it handles > more than one tone at the same time so that those mixed tones sound right. > > James > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Alsa-user mailing list > Alsa-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | [EMAIL PROTECTED] Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
