what machine can be used to measure sound waves
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Sound waves are basically mechanical waves. i.e they require a medium to pass.The Unit of measurement for Sound is actually dependent upon what physical feature of sound do you wish to measure. The most commonly used units used are dB (decibel) and Hz (hertz).
A sound level meter would be used to measure sound level, and the unit is in decibels, dB. You could also measure it with a microphone and oscilloscope, provided you could calibrate them against standard instruments.
An SWR meter is used to measure the ratio of standing waves in a line of transmission. This item is commonly used alongside CB radio equipment and other antennae.
Meters are used to measure length.Meters are used to measure length.Meters are used to measure length.Meters are used to measure length.
Hertz are used to measure cycles per second. Sound is measured in hertz. I hope I understood the question.