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Open Cabling Registration Course Australia > Sound > Flashcards

Sound Flashcards

Soundwaves etc

1
Q

Sound is created when an object vibrates against adjacent air particles, True or False?

A

True

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2
Q

A series of compressions and rarefactions that propagate through a medium is called _____.

A

Sound

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3
Q

The pitch of a sound is related to it’s frequency, True or False?

A

True

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4
Q

Velocity determines the loudness of sound, True or False?

A

False

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5
Q

Pure tone of one frequency is a complex wave, True or False?

A

False

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6
Q

The speed of sound through air is approx 330m/s, True or False?

A

True

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7
Q

Human ears can detect sound in a range of approximately 20 Hz to 20kHz, True or False?

A

True

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8
Q

Human voice is in a range of approximately 100Hz to 10kHz, True or False?

A

True

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9
Q

Voice range utilized in a phone circuit is approximately 300Hz to 3.4kHz, True or False?

A

True

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10
Q

Unwanted change to the form of a sound wave is referred to as _____.

A

Distortion

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11
Q

What is meant by the term distortion?

A

Unwanted change to the form of a sound wave

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12
Q

What is the medium that carries sound to the ear?

A

Air

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13
Q

Sound travels as fast as light, True or False?

A

False

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14
Q

The velocity of sound through seawater is approximately _____.

A

1490 m/s

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15
Q

The velocity of sound through a steel rod is approximately _____.

A

5000 m/s

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16
Q

Temperature and density of the medium will effect which component of sound?

A

Speed/velocity

17
Q

Sound waves are spherical, True or False?

A

True

18
Q

The intensity of a sound wave is _____ proportional to the _____ of its radius.

A

Inversely, square

19
Q

What is meant by the Inverse Square Law?

A

That a sound wave decreases in intensity as they travel over a distance.

20
Q

0 dB is the threshold of _____.

A

Hearing

21
Q

140 dB is the threshold of _____.

A

Pain

22
Q

Conversation is around approximately __ dB.

A

70

Open Cabling Registration Course Australia (2 decks)

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