Which term describes the number of cycles that occur per second in an ultrasonic wave?

Which term describes the number of cycles that occur per second in an ultrasonic wave?

• A. Frequency
• B. Velocity
• C. Amplitude
• D. Wavelength

Answer: (A)

Frequency is the number of cycles per second. That rate of oscillation is what describes how often the ultrasonic wave repeats its pattern each second, and it’s measured in hertz. In ultrasonics, the frequency setting determines how fine a detail you can resolve (higher frequency gives clearer detail) but usually reduces how deeply the wave can penetrate due to greater attenuation. Velocity is how fast the wave travels through the material, which depends on the material’s properties, not the rate of oscillation. Amplitude refers to the maximum displacement of the wave, i.e., how strong the signal is, not how often it repeats. Wavelength is the distance travelled during one cycle and depends on both speed and frequency (λ = v / f).

Frequency is the number of cycles per second. That rate of oscillation is what describes how often the ultrasonic wave repeats its pattern each second, and it’s measured in hertz. In ultrasonics, the frequency setting determines how fine a detail you can resolve (higher frequency gives clearer detail) but usually reduces how deeply the wave can penetrate due to greater attenuation.

Velocity is how fast the wave travels through the material, which depends on the material’s properties, not the rate of oscillation. Amplitude refers to the maximum displacement of the wave, i.e., how strong the signal is, not how often it repeats. Wavelength is the distance travelled during one cycle and depends on both speed and frequency (λ = v / f).