Question

Why ultrasonic waves can not be produced by loud speakers?

Answer 1

Ultrasonics cannot be produced by passing high frequency alternating current through loud speaker due to the following reasons. ... Loud speaker cannot vibrate at such high frequency. 2. Inductance of the speaker coil becomes so high and practically no current flows through it.

Answer 2

Loudspeakers do not generate ultrasonic waves; instead, they generate sound waves.

What are ultrasonic waves?

• Ultrasonic waves are defined as sound waves with a frequency greater than 20 kHz.
• Their propagation speed is determined by their frequencies.

Why ultrasonic waves can not be produced by loudspeakers?

• Ultrasonics cannot be produced by passing high-frequency alternating current through a loudspeaker.
• Such a high frequency of vibration is not possible for a loudspeaker.
• The speaker coil's inductance becomes so high that almost no current flows through it.

Hence, Loudspeakers cannot produce ultrasonic waves.