Electrical frequency is equal to which frequency?

Electrical frequency is equal to which frequency?

• A. Phase frequency
• B. Mechanical frequency
• C. Wavelength
• D. Acoustic frequency

Answer: (D)

When an electrical signal drives a device that emits sound, the rate at which the sound waves are produced matches the rate of the input signal. The term for that rate in the emitted sound is acoustic frequency. In a direct drive, if you feed the speaker or buzzer with a 440 Hz electrical signal, it vibrates and produces sound at 440 Hz. Wavelength is a spatial measure, and mechanical frequency describes the body’s vibration but not specifically the frequency of the audible sound described as acoustic frequency.

When an electrical signal drives a device that emits sound, the rate at which the sound waves are produced matches the rate of the input signal. The term for that rate in the emitted sound is acoustic frequency. In a direct drive, if you feed the speaker or buzzer with a 440 Hz electrical signal, it vibrates and produces sound at 440 Hz. Wavelength is a spatial measure, and mechanical frequency describes the body’s vibration but not specifically the frequency of the audible sound described as acoustic frequency.