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ABU 3 > SOUNDS > Flashcards

SOUNDS Flashcards

1
Q

Vibrations that travel through the air or another medium and can be heard when they reach a person’s or animal’s ear

Vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid, or solid

A physical wave or a series of pressure vibrations

A

SOUNDS

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2
Q

Frequency is measured in cycles per second, or ____, named after German physicist Heinrich Rudolf Hertz

A

HERTZ

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3
Q

The faster an object vibrates, the higher the frequency, then the higher the pitch of the sound

A

TRUE

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4
Q

The ____ of a sound is the frequency of its vibration

A

PITCH

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5
Q

It is the strength of the sensation received through ear

A

LOUDNESS

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6
Q

It is the characteristic of the sound which distinguishes it from another sound of some loudness and pitch

A

TONE QUALITY

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7
Q

The more vibrations per second, the higher the frequency and sound pitch

A

TRUE

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8
Q

The fewer vibrations per second, the lower the frequency and sound pitch

A

TRUE

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9
Q

Sound per unit area

A

SOUND INTENSITY

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10
Q

Distance between the resting position of the crest of a wave

How loud the sound is

A

AMPLITUDE

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11
Q

The pitch of the sound

A

FREQUENCY

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12
Q

The intensity/loudness of sound is measured in ____

A

Decibels (dB)

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13
Q

Decibels are logarithmic scale, not a linear scale.

A

TRUE

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14
Q

Normal conversation is ___ dB.

A

40-60 dB

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15
Q

Exposure to sounds louder than ___ dB can cause damage to the hearing

A

85 dB

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16
Q

Sound at __ dB is uncomfortable and can cause immediate damage

A

120 dB

17
Q

___ dB is the threshold of pain. Also known as noise-induced hearing loss

A

140 dB

18
Q

How sounds travel:
Sounds hit a surface and bounces back off of it

A

REFLECTION

19
Q

How sounds travel:
Sounds hit a surface and some of it is absorbed

A

ABSORPTION

20
Q

How sounds travel:
Sound that isn’t absorbed or reflected passes through the material, such as a wall

A

TRANSMISSION

21
Q

A surface that is rigid, flat and smooth usually reflects sound. The reflection of sound on a surface follows the behavior of reflected light, meaning that the angle of incidence is equal to the angle of reflection.

A

TRUE

22
Q

One characteristic of sound is that it can bend around an obstruction known as ___________

A

DIFFRACTION OF SOUND

23
Q

When a sound comes from a source, the hearer of the sound actually hears two types of sounds:

From the source and directly delivered to the hearer

A

DIRECT OR ORIGINAL SOUND

24
Q

When a sound comes from a source, the hearer of the sound actually hears two types of sounds:

From all directions of the room

A

REFLECTED SOUND

25
Q

Sound travels much faster in liquids and solids than it does on air

A

TRUE

26
Q

As sound travels much slower than the speed of light, the resulting defects in many rooms are ____ and ____.

A

ECHOES
REVERBERATIONS

27
Q

When the reflected sound which reaches the observer is delayed more than 0.058 seconds relative to the direct sound, they are distinguished as _____

A

ECHOES

28
Q

________ consists of successive reflections of sounds in a room

A

REVERBERATION

29
Q

_______ is what happens to a body when another vibrating body vibrates and initiates the other body to vibrate in harmony with it

A

RESONANCE

30
Q

The quality found in different materials that reduce reverberation times by absorbing sound energy and reducing sound levels

A

SOUND ABSORPTION

31
Q

Soft and porous materials absorb more sound

Fiber glass absorbs most sound

Concrete absorbs the least sound

A

TRUE

32
Q

Buildings with sound absorption are vulnerable to excessive reverberation

A

FALSE. Buildings WITHOUT sound absorption are the ones vulnerable to excessive reverberation

33
Q

The property in a wall that allows it to keep noise from passing from one side to the other by absorbing sound waves of different frequencies

Blocks or absorbs sounds. It is versatile and used in many spaces

A

SOUND INSULATION

34
Q

_______ absorb sound, minimizing noise from adjacent spaces

A

ACOUSTICAL BOARD

35
Q

_________ in office buildings are designed to foster collaboration and remove barriers between employees, such as office walls and cubicle barriers

A

OPEN CONCEPT SPACES

36
Q

Three challenges of architectural acoustics:

A
  • CONTROLLING NOISE POLLUTION
  • DEALING WITH ENVIRONMENTAL NOISE
  • PREDICTING SOUND DISTRIBUTION

ABU 3 (4 decks)

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