I seem to recall that the old Bell System spec for tone duration was
> 20ms, or 1/5th of a second.
That would be 1/50 of a second. Maybe it was 200ms?
I seem to recall that the old Bell System spec for tone duration was
> 20ms, or 1/5th of a second.
That would be 1/50 of a second. Maybe it was 200ms?
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