![]() You can relate the speed of the sound wave to its wave parameters by: The speed of a sound wave through air at room temperature and pressure is about 343 m/s. The higher the frequency of the sound wave, the higher the pitch. ![]() (That is, a 100 Hz wave has a frequency of 100 cycles per second.) The wavelength is the distance from one wave crest to the next.įor sound waves, amplitude is related to the loudness of the sound, and frequency is related to the pitch. Frequency is usually measured in cycles per second, also known as hertz (Hz). You find the frequency of a wave by counting how many wave crests pass a fixed point in a certain interval of time. The amplitude is the "height" of the wave, or in other words, a measure of the energy in the wave. Physicists characterize waves by three parameters: amplitude, frequency, and wavelength. For a longitudinal wave, the medium vibrates in the same direction as the wave motion (example: waves along a slinky). For a transverse wave, the medium vibrates at right angles to the wave motion (example: waves on a rope). Waves come in two varieties: transverse and longitudinal. They are a disturbance propagating though a medium in such a way that the disturbance moves, but the medium itself does not. We have all seen waves (water waves, flags rippling in the wind, vibrations along ropes or strings), so we know what they are when we see them.
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