Duty cycle is defined as the percentage of time that ultrasound is generated, which equals what?

Duty cycle is defined as the percentage of time that ultrasound is generated, which equals what?

• A. Pulse Duration Over One Pulse Period
• B. Current Over Voltage
• C. Energy Delivered Per Minute
• D. Pulses Frequency

Answer: (A)

Duty cycle tells you how long the ultrasound is on in each cycle. It’s the pulse duration divided by the total period of the cycle (on time divided by on time plus off time). For example, if the device is on for 2 ms and off for 8 ms, the period is 10 ms and the duty cycle is 2/10, or 20%. This shows why the correct expression is pulse duration over one pulse period. The other options describe electrical ratios or how often pulses occur, not the fraction of time the ultrasound is actively emitted.

Duty cycle tells you how long the ultrasound is on in each cycle. It’s the pulse duration divided by the total period of the cycle (on time divided by on time plus off time). For example, if the device is on for 2 ms and off for 8 ms, the period is 10 ms and the duty cycle is 2/10, or 20%. This shows why the correct expression is pulse duration over one pulse period. The other options describe electrical ratios or how often pulses occur, not the fraction of time the ultrasound is actively emitted.