The pitch of a sound is determined by its frequency. Frequency refers to the number of sound wave cycles that pass a point per second, measured in Hertz (Hz).
This means that the faster the sound waves vibrate, the higher the pitch we perceive.
Relating this to the question:
Therefore, the correct answer correctly pairs high pitch with high frequency and low pitch with low frequency.
The correct option states: high frequency and low frequency, respectively.
Ultrasonic pulse echo technique, a non-destructive ultrasonic testing, is employed for any possible flaw detection in a metallic bar of thikness 30 cm. If the arrival times of the ultrasonic pulses are 45 μs and 90 μs respectively, the distance of the flaw from one end of the steel bar at which the ultrasonic pulse initially enters the steel bar, will be:
In which of the following medium, velocity of light is maximum?