1. Technical Theatre
Sound Frequency
5/8/2019

2. Objectives Today you will learn about sound frequencies and pressure.
You will also learn about how various aspects of sound are measured.
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3. Terminology Complete the Vocabulary Squares for the Following:
Frequency
Peak
Trough
Pitch
Hertz
Amplitude
Decibel
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4. Terminology Frequency
The number of cycles per unit of time of a wave.
Go to to access .wav files demonstrating sounds.
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5. Terminology Peak Trough Pitch
The top of a wave. Wavelength is measured peak to peak.
Trough
The bottom of a wave.
Pitch
The height or depth of a tone dependent upon the rapidity of vibrations.
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6. Terminology Hertz Amplitude Decibel
Hz. A unit of frequency measured in cycles per second. Named for Heinrich Rudolph Hertz.
Amplitude
The volume of a sound measured from peak to trough.
Decibel
dB. The measure of sound pressure.
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5/8/2019

7. Terminology
Decibel – The measure used to determine the sound pressure level given a reference of zero.
This is important as the pressure of the sound is what damages the hearing organ.
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8. Understanding Decibels
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9. Decibels
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10. Decibels
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11. Closure
Exit Ticket-
Write a letter to a friend explaining the learning today and your reaction to it.
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5/8/2019