3 ms·

So, a high frequency DTMF[0] construction should render a pre-echo? What’s the lowest definition of “high” pairs that would satisfy showing this encoding breaka

by bch 8y ago

So, a high frequency DTMF[0] construction should render a pre-echo? What’s the lowest definition of “high” pairs that would satisfy showing this encoding breakage but be hearable by a majority of people[1]? [0] https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_sign... [1] https://en.m.wikipedia.org/wiki/Presbycusis https://en.m.wikipedia.org/wiki/Presbycusis

vortico 8y ago
No, pre-echos are unrelated to high-frequency sine waves. And DTMF aren't what I'd consider high-frequency. I'm talking about 4-20kHz.
- bch 8y ago
  Ahhh... I think I misunderstood your “dialup noises” as dial tone noises. You’re talking about the high pitched squelch-y initial negotiation of a modem.