Y8 Physics Sounds/ Hearing Flashcards

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1
Q

What is a sound?

A

A sound is a vibration

The air particles move and carry the sound to our ears.

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2
Q

If the amplitude is low

What will the wave look like?

A

The wave will be short and not tall

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3
Q

What is sound measured with?

A

Hertz /Hz

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4
Q

High amplitude means…

A

Tall waves but the space stays the same

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5
Q

What is an ACOUSTIC guitar

A

A hollow guitar

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6
Q

What is the wavelength?

A

The wavelength is the distance taken up by one complete wave

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7
Q

What is frequency?

A

Number of waves per second/minute/hour

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8
Q

What is amplitude?

A

Loudness
Height of wave
Half of a wavelength

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9
Q

Amplified means

A

How loud it is

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10
Q

Natural frequency is..

A

Is a frequency at which two objects vibrate at the same frequency

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11
Q

If a finger is ran around a glass it sings

explain how

A

The glass vibrates at a certain frequency

This is called the natural frequency

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12
Q

If we run a finger around a glass too fast does it sing?

What about too slow?

A

No it has to be exactly the right frequency for the glass to vibrate

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13
Q

What is frequency measured in?

A

Hertz/ Hz

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14
Q

Do ALL objects have a natural frequency?

A

Yes

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15
Q

Why does hollow space amplify the sound?

A

It amplifies the sound because the waves travel through air and it echos.

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