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    The shrill, annoying whine of the signal generator has clearly made a lasting impression on generations of Warwick School boys who have chosen this experiment to sum up their memories of school science. Connected to a loudspeaker and CRO (cathode ray oscilloscope) the challenge is to fiddle with seemingly innumerable buttons and switches to capture the illusive image of that ghostly green waveform on a small, square screen. Only then can the teacher’s objective for the lesson be achieved and the wavelength, frequency or amplitude of the sound be measured.

    Boys’ aims of making as much noise as possible, at a particularly piercing pitch, always seem much more easily fulfilled!


    1. OB71