Module 1 - Physical Acoustics 3

Intro :: Acoustics :: Vibration :: Waves :: Resonance

Resonance Physical systems will resonate when excited by a force applied at a specific frequency. Consider a simple mechanical system: a child in a swing. The swing has a natural frequency that is determined by its length. If the swing is given a small push at the right time in each cycle, its amplitude gradually increases. This is an example of resonance. To successfully complete this chapter you should... Read chapter 4 in your text book (pages 53 - 62). Carefully study the important concepts on resonance. Be able to describe the nature of resonance. Be able to calculate the resonant frequencies for vibrating strings and pipes. Be able to draw the resonant modes for strings in pipes. Important Concepts Partials Harmonics Overtones Open and closed pipes Acoustic impedance Sympathetic vibration