What unit is used for frequency in noise measurements?

What unit is used for frequency in noise measurements?

• A. Meters per second (m/s)
• B. Cycles per second (cps) or hertz (Hz)
• C. Feet per cycle
• D. Decibels (dB)

Answer: (B)

Frequency measures how often a waveform repeats each second. The standard unit for that is cycles per second, which is also called hertz. One hertz equals one cycle per second. Meters per second is a speed, not a frequency. Feet per cycle isn’t a recognized unit for frequency, and decibels describe sound level, not how often the wave repeats. So the appropriate unit is cycles per second (cps) or hertz (Hz).

Frequency measures how often a waveform repeats each second. The standard unit for that is cycles per second, which is also called hertz. One hertz equals one cycle per second.

Meters per second is a speed, not a frequency. Feet per cycle isn’t a recognized unit for frequency, and decibels describe sound level, not how often the wave repeats.

So the appropriate unit is cycles per second (cps) or hertz (Hz).