search for: 3400hz

...tp://users.hfx.eastlink.ca/~amstereo/amstereo.htm> for more information. > Telephone is nominally 8 kHz mono > (i.e. really bad) though I think the use of digital voice codecs in the > last 20 years may have improved on this a bit. Telephone lines (POTS) have a frequency range of 300-3400Hz. That means 7kHz mono should be enough, although 8kHz is generous towards the transition bandwidth/roll-off. - Andrew

[ > Telephone is nominally 8 kHz mono (i.e. really bad) though I [ > think the use of digital voice codecs in the last 20 years may [ > have improved on this a bit. [ [ Telephone lines (POTS) have a frequency range of 300-3400Hz. That [ means 7kHz mono should be enough, although 8kHz is generous towards [ the transition bandwidth/roll-off. 7 kHz would require a tighter brick-wall filter than even CD, are you even sure it's possible to go from flat to silent in 100 Hz (between 3400 Hz and 3500 Hz)? Almost all te...

Is there a list somewhere of "standard" encoding rates? I know, for example, CDs are encoded at 44100, as is a lot of digital sound, but I've seen programs that specify different levels of quality (like radio, phone, tape, CD) and I'd like to know if there are some encoding rates that are accepted as standardized for recording at different levels of quality. If so, is there