["Followup-To:" header set to sci.electronics.basics.]
On 2007-06-30, John Smith I wrote:
Radium wrote:

WTF are you thinking when you describe the 20 Khz signal as, "a
pure-sine-wave-tone] with a frequency of 20 KHz and an
amplitude of 1-watt-per-meter-squared"

Candela

Admittedly an odd unit to use for radiation at that frequency.

Bye.
Jasen