The technical term is frequency, but many of us know it as pitch. We measure sound frequency in hertz (Hz), which represents cycles-per-second, with faster frequencies creating higher-pitched sounds.

The sound works on the body and mind through the central nervous system, which responds both to the sounds made themselves as well as to vibrations that come from the instruments used.

Low-frequency sounds travel further than high-frequency sounds, but high-frequency sound gives more detailed echoes, so bats generally use higher frequencies when tracking down food. Most bat calls ...

If the offending frequency range sounds louder and even more annoying, that's the one to work with. Otherwise, return that band to zero and try another until you locate the band or bands closest ...

"Sound-frequency map for inner ear created with advanced X-ray technology." ScienceDaily. ScienceDaily, 25 February 2021. <www.sciencedaily.com / releases / 2021 / 02 / 210224090620.htm>.