10-30-2021, 01:07 PM
Dear Erik,
the measurements have to be done not between the speakers (it should work but it is not the classical geometry of the interference pattern from two sources), but along a line parallel to the line connecting the speakers. Distance from the sources to the measurement line is d. d can be much bigger than the distance between speakers L, which should be larger than the wavelength.
The sound level was not so high in my case and no protection was needed, but 4 kHz is not very pleasant to hear if you do not know that this is for a scientific reason
...
Regards
Mikhail
the measurements have to be done not between the speakers (it should work but it is not the classical geometry of the interference pattern from two sources), but along a line parallel to the line connecting the speakers. Distance from the sources to the measurement line is d. d can be much bigger than the distance between speakers L, which should be larger than the wavelength.
The sound level was not so high in my case and no protection was needed, but 4 kHz is not very pleasant to hear if you do not know that this is for a scientific reason
...Regards
Mikhail