Chapter 15 – Sound

Sound waves are longitudinal

Diagram of the Ear

Beats are formed by the interference if two waves of slightly different frequencies traveling in the same direction. In this case one beat occurs at T-2 where constructive interference is greatest. BEAT (continued)

The frequency of vibration is called the fundamental frequency of a vibrating string. Because frequency is inversely proportional to wavelength and because we are considering the greatest possible wavelength, the f undamental frequency is the slowest vibration which produces the lowest pitch. Fundamental Frequency = F 1 = V/wavelength = V/2L Fundamentals

First through Fifth Harmonics

the end