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Physics

Module 3: Waves and Thermodynamics

Practical Investigation: Pitch and Loudness of a Sound

What is the pitch and loudness of a sound?

In this post, we conduct a practical investigation to relate the pitch and loudness of a sound to its wave characteristics, as a part of the Prelim Physics course under the module Waves and Thermodynamics and sub-part Sound Waves. A pitch of a sound corresponds to the frequency of the sound, for example, a high pitch corresponds to a sound with a high frequency, and vice versa. The loudness of a sound is the intensity of sound waves, in which intensity is a measure of the amount of energy in sound waves in decibels (dB).

The following two videos are a demonstration of the pitch and loudness in everyday objects.

 

Part 1: Sound and pitch

 

Part 2: High and low pitch