Ultrasound Physics Ch 4-6

Which of the following is a parameter that describes the time from the start of the pulse to the end of the pulse?

• Pulse Duration

• Wave Amplitude

• Sound Intensity

• Frequency Modulation

What does the Duty Factor describe in pulsed sound?

• the percentage of time that the US machine is producing a pulse or transmitting sound

• The length of the sound wave

• The frequency of the sound

• The amplitude of the sound wave

Which parameter is the time from the start of one pulse to the start of the next pulse?

• Pulse Repetition Period

• Spatial Pulse Length

• Duty Factor

• Pulse Duration

What does Spatial Pulse Length refer to in the context of pulsed sound?

• The distance a pulse occupies in space

• The time between pulses

• The frequency of the pulse

• The amplitude of the pulse

What determines the pulse duration?

• The medium through which it travels

• The source, and it cannot be adjusted

• The temperature of the environment

• The distance it travels

How is pulse duration calculated?

• # cycles x frequency (Hz)

• # cycles x amplitude

• # cycles x period (μs)

• # cycles x wavelength

What does the spatial pulse length (SPL) represent in space?

• The frequency of a pulse

• The length or distance that a pulse occupies

• The speed of a pulse

• The amplitude of a pulse

What determines the spatial pulse length (SPL)?

• The frequency and amplitude

• The source and medium

• The temperature and pressure

• The speed and direction

How is spatial pulse length (SPL) related to wavelength?

• SPL is inversely proportional to wavelength

• SPL is directly proportional to wavelength

• SPL is unrelated to wavelength

• SPL is equal to the square of the wavelength

What is the formula for calculating spatial pulse length (SPL)?

• SPL = frequency x wavelength

• SPL = amplitude x wavelength

• SPL = # cycles x wavelength

• SPL = speed x wavelength