ocr: Measuring sound Soundwaves are waves of high and low pressure created by a vibrating object. The distance between tWo neighbouring areas ofhigh or low pressure is called the wavelength. HIGH PRESSURE TIME TRESSURE LOW PRESSURE A soundwave Sounds can be loud or quiet, high or low. This is called the pitch of a sound and it depends on how rapidly the object making the sound vibrates. An object that vibrates rapidly produces shorter wavelengths and a high-pitched sound. The number of times that an object vibrates in one second is called the trequency. This is measured in units called hertz (Hz). ...
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