|Chronology||Current Month||Current Thread||Current Date|
|[Year List] [Month List (current year)]||[Date Index] [Thread Index]||[Thread Prev] [Thread Next]||[Date Prev] [Date Next]|
On Oct 9, 2020, at 2:35 AM, bernard cleyet <email@example.com> wrote:_______________________________________________
A friend reminded me of a demo. at the Naval Postgrad. School, wherein an ultrasonic speaker generated wave is voice modulated in order to produce a rather narrow bean Tannoy. I presume it works by the ear’s being non-linear in amplitude response. Any idea if it would work W/a hearing aid that has no gain above about 8k Hz?
bc whose hearing is about 60 dB down.
Forum for Physics Educators