can you leave a voicemail from *67
For those still using analogue or digital phone systems, voice on ISDN circuits has a bandwidth of around 4000Hz. The audio from an analogue phone is sampled at 8000Hz, and because of the nyquist theorem, must be low-pass filtered to 4000Hz. So any frequencies in the audio beyond 4000Hz are lost. Interestingly, the human ear and mind are good at recognising human speech, so this is considered "toll-quality" voice, i.e. good enough to pay for. This is the reason why certain vocalised letters are difficult or impossible to tell apart on the phone. For example, the differences between B, P, T, C, etc. are almost entirely above 4000Hz.
how to hold your phone for facetime
best business phone messages
how to write business emails examples
what banks offer secured business credit cards
how to get hold music on your cell phone
how to take a uniden phone off hold
hold phone steady while recording
free music for on hold messages
how can you leave a voicemail without the phone ringing
on hold message length
how do i put someone on hold on my cell phone
how do you put cell phone on hold
