Chapter | four
Signal Types
CHAPTER OUTLINE
Acoustic Measures of Musical Instruments
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 – regardless of how many frequencies it might contain – 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.
PURE TONES
Pure tones are characterized by a sinusoidal waveform (see Figure 4.1). These are periodic signals that contain ...
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