The Waveform

3
The Waveform time (ms) pressure • Microphone converts pressure to voltage • Plot pressure vs. time • Sound always has an oscillating pressure vs. time

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pressure. time (ms). The Waveform. Microphone converts pressure to voltage Plot pressure vs. time Sound always has an oscillating pressure vs. time. period. T = 2.2 ms. T = 7 ms. Compare Waveforms. f = 1/T = 460 Hz. f = 1/T = 140 Hz. period. amplitude. pure tone = sine wave. - PowerPoint PPT Presentation

Transcript of The Waveform

Page 1: The Waveform

The Waveform

time (ms)

pres

sure

• Microphone converts pressure to voltage• Plot pressure vs. time• Sound always has an oscillating pressure vs. time

Page 2: The Waveform

Compare Waveforms

period

T = 2.2 ms

T = 7 ms f = 1/T = 140 Hz

f = 1/T = 460 Hz

Page 3: The Waveform

pure tone = sine wave

• Definite period single, constant frequency• Described by only two numbers: f, A

ampl

itude

period

How can we describe more complicated sounds?What creates a sine wave?


Waveform Facts

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