Properties of Sound Waves Flashcards

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1
Q

Sound Waves

A

Longitudinal waves caused by vibrations that travel through a material medium.

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2
Q

Speed of Sound

A

The speed depends on the medium; faster in liquids and solids than in gases.

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3
Q

Loudness

A

Determined by the intensity, which depends on the amplitude of the sound wave and distance from the source. Measured in decibels (dB).

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4
Q

Pitch

A

A measure of how high or low a sound is perceived, depending on the frequency of the sound wave.

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5
Q

Infrasound

A

Sound waves with a frequency lower than 20 Hz, below the range of human hearing.

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6
Q

Ultrasound

A

Sound waves with frequencies higher than 20,000 Hz, above the range of human hearing.

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7
Q

Musical Instruments

A

Produce sound through vibration of strings, air columns, or membranes; rely on standing waves.

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8
Q

Resonance

A

Occurs when two objects naturally vibrate at the same frequency, amplifying the sound.

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9
Q

Human Ear

A

Divided into outer, middle, and inner regions, the ear senses vibrations, amplifies them, and transmits signals to the brain.

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10
Q

Sonar

A

Sound navigation and ranging; uses acoustic signals and echo returns to determine the location of objects underwater.

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11
Q

Ultrasound Imaging

A

Uses high-frequency ultrasound waves to create computerized images called sonograms.

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12
Q

Doppler Effect

A

An observed change in the frequency of a wave when the source or observer is moving.

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13
Q

Intensity

A

Describes the rate at which a sound wave transmits energy through a given area of a medium.

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13
Q

Sonic Boom

A

A shock wave created when a source moves as fast or faster than the speed of sound, producing a loud sound similar to an explosion.

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14
Q

Pitch and Frequency

A

Higher-pitched sounds are caused by sound waves with higher frequencies, and vice versa.

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