What term describes the range of frequencies found in pulsed ultrasound?

What term describes the range of frequencies found in pulsed ultrasound?

• A. Bandwidth
• B. Amplitude
• C. Acoustic variables
• D. Continuous wave

Answer: (A)

Bandwith is the range of frequencies present in a pulsed ultrasound signal. A pulse of finite duration cannot be a single pure frequency; its abrupt start and stop create a spectrum of frequencies around the center frequency. Shorter pulses produce a broader spectrum (broader bandwidth), while longer pulses yield a narrower spectrum. This spread distinguishes pulsed ultrasound from continuous wave, which effectively uses one frequency. Amplitude describes how strong the signal is, and acoustic variables refer to physical properties like pressure and density, not the frequency range.

Bandwith is the range of frequencies present in a pulsed ultrasound signal. A pulse of finite duration cannot be a single pure frequency; its abrupt start and stop create a spectrum of frequencies around the center frequency. Shorter pulses produce a broader spectrum (broader bandwidth), while longer pulses yield a narrower spectrum. This spread distinguishes pulsed ultrasound from continuous wave, which effectively uses one frequency. Amplitude describes how strong the signal is, and acoustic variables refer to physical properties like pressure and density, not the frequency range.