By the end of this section, you will be able to define intensity, sound intensity, and sound pressure level and to calculate sound intensity levels in decibels (dB).

A physics tutorial on designing an auditorium and solving the problem of sound reflection. Illustrated.

Study the details of sound from characteristics to speed, ultrasound, infrasound, and other aspects of sound waves.

Here is described a simple process to 'put a voice on a sunbeam' and transmit it over a distance. It is a fascinating example of amplitude modulation of light using sound vibrations. It then describes how the modulated light is detected...