wackyvorlon
Critical Thinker
- Joined
- Dec 10, 2008
- Messages
- 333
A quick point regarding telephone system bandwidth:
The vast majority of the system is still analog, so the audio signal commonly has to travel over more than a mile of wire. THe impedance of that wire can be a big issue. At audio frequencies, impedance varies widely within the band we can hear. Telephone engineers try to keep the bandwidth as narrow as possible to make it easier to compensate for these swings in impedance.
As such, there is no interest whatsoever in preserving infrasound and ultrasound.
The vast majority of the system is still analog, so the audio signal commonly has to travel over more than a mile of wire. THe impedance of that wire can be a big issue. At audio frequencies, impedance varies widely within the band we can hear. Telephone engineers try to keep the bandwidth as narrow as possible to make it easier to compensate for these swings in impedance.
As such, there is no interest whatsoever in preserving infrasound and ultrasound.