To measure sounds frequency you have to do a sound test.
Frequency is how often something happens.
Gamma Rays
frequencey
A frequency diagram.
The sounds they measure and listen to when doing a transvaginal ultrasound and tell you you are not pregnant are ultrasounds.
The hertz (Hz) is commonly used. Its dimensions are 1/second.
watt is a unit of measure. Units of measure don't make sounds.
The Doppler effect is a change of the frequencey of a wave, due to relative movement between source and observer.
Rechargable battery life willd epend on the device in which they are used and the frequencey in which they are charged.
Frequency = (speed)/(wavelength) = 10/20 = 1/2
oscilloscope
Take a sound pressure level meter (SPL meter). Try to measure the sound pressure p.