Select the instrument that works on the principle of multiple reflection of sound.
Watthour meter
Sonar
Stethoscope
Decibel meter

Question

Select the instrument that works on the principle of multiple reflection of sound-Watthour meterSonarStethoscopeDecibel meter

Toppr Admin · Accepted Answer

The sound of a heartbeat - or lungs - reaches the doctor-apos-s ears by the multiple reflections of sound waves through the stethoscope tube- The propagation of sound is shown in the figure-

Select the instrument that works on the principle of multiple reflection of sound.Watthour meterSonarStethoscopeDecibel meter

The sound of a heartbeat ( or lungs ) reaches the doctor's ears by the multiple reflections of sound waves through the stethoscope tube. The propagation of sound is shown in the figure.

Select the instrument that works on the principle of multiple reflection of sound.
Watthour meter
Sonar
Stethoscope
Decibel meter