Question 1

The ratio of the total floor area inclusive of all the floors to the area of the plot on which building stands is known as ___________
A)groundage
B)plot area
C)floor area
D)built-up area

Accepted Answer

The built-up area is the total floor area inclusive of all the floors divided by the area of the plot on which the building stands.

Question 2

Which of the following is not a characteristic of sound?
A)intensity
B)frequency
C)speed
D)quality

Accepted Answer

C

Question 3

Sound travels faster in gases than in solids.

Accepted Answer

Sound travels faster in solids than in gases because particles in solids are closer together, allowing sound waves to transmit more quickly.

Question 4

The velocity of sound in bricks is __________
A)1450 m/sec
B)343 m/sec
C)3000 m/sec
D)4300 m/sec

Accepted Answer

The velocity of sound in bricks is approximately 4300 m/sec, which is typical for solid materials like bricks.

Question 5

The intensity of sound is proportional to __________ of amplitude.
A)square root
B)cube root
C)square
D)cube

Accepted Answer

The intensity of sound is proportional to the square of the amplitude. This means that if the amplitude of a sound wave doubles, its intensity increases by a factor of four.

Question 6

Which of the following relations between loudness and intensity is correct?
A)i ? log l
B)i ? log l2
C)l ? log i
D)l ? log i2

Accepted Answer

Loudness (l) is proportional to the logarithm of intensity (i), which is represented as $l \propto \log(i)$. This relationship is based on the Weber-Fechner law, which describes how the perceived loudness increases logarithmically with the intensity of the sound.

Question 7

Which law states that the magnitude of a sensation is directly proportional to the logarithm of the physical stimulus producing it?
A)beer-lambert law
B)huygens-fresnel law
C)lorentz law
D)weber and fechner's law

Accepted Answer

Weber and Fechner's law, also known as Fechner's law, states that the perceived intensity of a stimulus is proportional to the logarithm of its physical intensity, indicating a logarithmic relationship between sensation and stimulus.

Question 8

The intensity of sound depends on the ear of the listener.

Accepted Answer

The intensity of sound is a physical property that depends on the energy of the sound wave, not on the listener's ear.

Question 9

The amount of sound transmitted outside a room depends on the surface while the amount of
sound reflected or absorbed depends on the sound insulation properties of the surface.

Accepted Answer

The answer of The amount of sound transmitted outside a...

Question 10

Which of the following statements is correct?
A)pitch of the sound increases with increase in frequency
B)pitch of the sound decreases with increase in frequency
C)decibel is equal to 1/100 of bel
D)increase in the amplitude of the sound decreases the intensity

Accepted Answer

The pitch of a sound is directly related to its frequency; as the frequency increases, the pitch becomes higher.

Question 11

For an echo to be distinguished as separate, it should reach the ear _________ of a second after the direct sound.
A)one-fourth
B)one-fifth
C)one-eighth
D)one-tenth

Accepted Answer

For an echo to be distinguished as a separate sound, it should reach the ear at least one-tenth of a second after the direct sound. This time gap allows the brain to perceive the echo as a distinct sound rather than merging it with the direct sound.

Question 12

Reverberation time is directly proportional to ____________
A)effective surface area
B)lateral surface area
C)volume of the room
D)shape of the room

Accepted Answer

Reverberation time is directly proportional to the volume of the room. This is because a larger room volume means sound waves have more space to travel before being absorbed, thus increasing the time it takes for the sound to decay.

Question 13

In the Sabine's expression for reverberation time t=0.16V/A, A represents __________
A)area of the room
B)volume of the room
C)total absorbing power
D)total adsorbing power

Accepted Answer

A represents the total absorbing power of all surfaces in the room, including the air. This is a measure of how much sound energy is absorbed by the surfaces and air in the room, rather than being reflected.

Question 14

Reverberation time is independent of the shape of the room.

Accepted Answer

Reverberation time is a measure of how long it takes for sound to decay in a room. It is determined by the volume of the room, the amount of sound absorption in the room, and the shape of the room. The shape of the room affects the way that sound waves reflect off of the walls, ceiling, and floor, which can affect the reverberation time.

Question 15

The absorption of a surface is the product of the __________ of the surface and its absorption coefficient.
A)length
B)area
C)volume
D)width

Accepted Answer

The absorption of a surface is determined by its area and its absorption coefficient, as the area directly influences how much radiation or sound can be absorbed.

Question 16

Calculate the transmission loss given the sound levels measured on either side of the wall is 60 dB and 40 dB.
A)20 db
B)100 db
C)60 db
D)2400 db

Accepted Answer

The answer of Calculate the transmission loss given the sound...

Question 17

Hard materials used for sound insulation are good absorbers.

Accepted Answer

Hard materials are generally good reflectors of sound, not absorbers. Sound absorption is better achieved with soft, porous materials that can trap and dissipate sound waves.

Question 18

In rigid homogeneous walls, the transmission loss of a one-brick wall is _________
A)10 db
B)20 dbc.
C)50 db
D)70 db

Accepted Answer

The transmission loss of a one-brick wall is typically around 50 dB, which indicates its ability to reduce sound transmission through the wall.

Question 19

In cavity wall construction for soundproofing, the width of the cavity should be at least _________
A)3 cm
B)5 cm
C)8 cm
D)12 cm

Accepted Answer

For effective soundproofing in cavity wall construction, the width of the cavity should be at least 5 cm. This size helps in reducing sound transmission by creating a break between the two sides of the wall.

Question 20

The sound insulation offered by rigid homogenous walls decreases with the increase in the
thickness of the wall.

Accepted Answer

The sound insulation of a wall generally increases with the thickness of the wall because a thicker wall has more mass, making it harder for sound waves to pass through.

Quiz 1: Understanding Sound and Acoustics in Building Design

The ratio of the total floor area inclusive of all the floors to the area of the plot on which building stands is known as ___________

Which of the following is not a characteristic of sound?

Sound travels faster in gases than in solids.

The velocity of sound in bricks is __________

The intensity of sound is proportional to __________ of amplitude.

Which of the following relations between loudness and intensity is correct?

Which law states that the magnitude of a sensation is directly proportional to the logarithm of the physical stimulus producing it?

The intensity of sound depends on the ear of the listener.

The amount of sound transmitted outside a room depends on the surface while the amount of sound reflected or absorbed depends on the sound insulation properties of the surface.

Which of the following statements is correct?

For an echo to be distinguished as separate, it should reach the ear _________ of a second after the direct sound.

Reverberation time is directly proportional to ____________

In the Sabine's expression for reverberation time t=0.16V/A, A represents __________

Reverberation time is independent of the shape of the room.

The absorption of a surface is the product of the __________ of the surface and its absorption coefficient.

Calculate the transmission loss given the sound levels measured on either side of the wall is 60 dB and 40 dB.

Hard materials used for sound insulation are good absorbers.

In rigid homogeneous walls, the transmission loss of a one-brick wall is _________

In cavity wall construction for soundproofing, the width of the cavity should be at least _________

The sound insulation offered by rigid homogenous walls decreases with the increase in the thickness of the wall.