On 28-Dec-16, at 9:00 AM, Przemek Skoskiewicz wrote:
>
> The frequency of 14.500 – 15.000 Hz with 90 Dezibel is audible
Hi All
There seems to be confusion here. The stated 14.000 - 15.000 hz is
surely 14 - 15 khz. 15 hz @ 90db would likely shake a hive to
pieces. 90db is near the threshold of pain at almost all audible
frequencies whether you can hear it or not. But maybe this guy has got
something.
Bob Darrell
Caledon Ontario
Canada
44N80W
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