Christopher Maple

A member of the Philip Greenspun's Homepage community since December 16, 2002

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December 16, 2002, on Stereos of the Rich and Famous:
Frequency response of hearing varies widely among individuals. Until I was 30 I could hear beyond 30 kHz. There was a department store in Meriden, Connecticut that I couldn't enter because of the pain caused by their so-called ultrasonic burglar alarm which was run all day long. By the time I was 40 I couldn't hear the 15.7 kHz whine some televisions make.