ABSTRACT

Signal Types CHAPTER OUTLINE Pure Tones ...................................................................................................................................19 Complex Tones............................................................................................................................19 Special Waveforms ....................................................................................................................21 Noise Signals...............................................................................................................................22 The Voice as a Sound Source..............................................................................................23

Acoustic Measures of Musical Instruments.....................................................................28 Bibliography.................................................................................................................................32

Sound is pressure that varies over time. Represented in electrical form, it is

voltage or current that varies over time. This means that every sound e regard-

less of how many frequencies it might contain e can be described by a signal’s variation in time or waveform. Some of the more typical waveforms and their

frequency content are discussed in this chapter.