Sound definition Flashcards


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created 9 days ago by ChristaG
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physics
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1

Overtones

Frequencies which are multiples of a certain frequency

If f is a given frequency, 2f is its first overtone

2

Loudness

The greater the amplitude the greater the loudness

3

Pitch

The higher the frequency the higher the pitch

4

Quality

The quality of a musical note depends on the number of overtones present in the note and the relative strengths of the different overtones present

5

Frequency limits of audibility

The highest and lower frequencies that can be heard by a normal human ear

6

Resonance

If the frequency of a periodic force applied to a body is the same as or very near to its natural frequency that body will vibrate with very large amplitude

7

Infrasonic

Sound waves with frequency lower than 20Hz

8

Ultrasonic

Sound waves with frequency above 20 000Hz

9

Sound intensity of a point

The rate at which sound energy is passing through unit area at right angles to the direction in which the sound is travelling at that point

10

Threshold of hearing

Smallest sound intensity detectable by the average human ear at a frequency of 1kHz

11

Beats

Periodic variation in the loudness of a sound

12

Fundamental frequency of a string

A string vibrating with an antinode at its centre and a node at each end

13

Harmonics

Frequencies which are multiples of a certain frequency