Reference: Hodge-podge

SAMONIAN DIGITAL LIBRARY

Dubai, United Arab Emirates

ITEM QUESTION & CHOICES ANSWER REMARK

1

Regardless of other characteristic properties such as amplitude or phase,

the wave consists of a single frequency. What is a tone with a sinusoidal

waveform such as sine or cosine wave? A. Fourier Analysis B. Sinusoid

C. Pure Tone D. Oscillation

C

2

In 1822, what wave did French mathematician Joseph Fourier discover that

can be used as simple building blocks to describe and approximate any

periodic waveform, including square waves. A. Fourier Wave B.

Sinusoidal Wave C. Sawtooth Wave D. Cosine Wave

B

3

In acoustics, what is the efficacy by which sound energy is spread evenly in a given

environment? Best example of sound _____ is eggcrates, which are the cheapest

material for this kind of sound treatment. A. Diffraction B. Refraction C. Sound

Baffle D. Diffusion

D

4What is the bending of waves around small obstacles and the spreading out of waves

beyond small openings? A. Diffraction B. Refraction C. Sound Baffle D. Diffusion A

5What is the bending of waves when they enter a medium where their speed is

different? A. Diffraction B. Refraction C. Sound Baffle D. Diffusion B

6

What is a construction or device which reduces the strength (level) of airborne sound? It is a fundamental

tool of noise mitigation, the practice of minimizing noises pollution or reverberation. An important type of

this device is the noise barrier and tunnels construction along roads and highways to reduce sound levels

at properties in the vicinity. A. Sound Waffles B. Panel Absorbers C. Noise Barriers D. Baffles

D

7

Measured in rayl/m2 or Pascal-sec/m3, what are the measures of the opposition that a system presents to

the acoustic flow resulting of an acoustic pressure applied to the system? A. SAC B. NRC C. Acoustic

Impedance D. OscillationC

8What is the repetitive variation, typically in time, of some measure about a central value (often a point of

equilibrium) or between two or more different states? A. Oscillation B. Impedance C. Pendulum A

9

What is the point on a wave with the maximum value of upward displacement within a cycle, opposite of

trough which is therefore the point on a wave with the minimum value of downward displacement in the same cycle? A. Cycle B. Superposition C. Crest D. Constructive Interference

C

10

What is the interval between one musical pitch and another with half or double its frequency? It is the unit

of frequency level as defined by ANSI when the base of the logarithm is two. A. Harmonics B. Pitch C.

Octave D. SymphonyC

11

What is a component frequency of the signal that is an integer multiple of the fundamental frequency,

such as if the fundamental frequency is f, the harmonics have frequencies 2f, 3f, 4f, etc.? A. Harmonics B. Pitch C. Octave D. Symphony

A

12

What is a single number rating used for comparing acoustical ceilings and acoustical screens for speech

privacy purposes? Its values increase with increasing privacy and range from approximately 100-250.

This classification supersedes Speech Privacy Noise Isolation Class (NIC) rating method. A. Noise

Reduction Coefficient (NRC) B. Sound Absorbing Coefficient (SAC) C. Articulation Class (AC)

C

13A measure of speech intelligibility influenced by Acoustical Environment rated from 0.01 to 1.00. A.

Articulation Index (AI) B. Articulation Class (AC) C. Sound Intelligibility A

DIRECTION: Select the best answer.

EXAMINEE: RATING: TOPIC CODE: AC 03-04ARCHITECTURAL ACOUSTICS

01

Reference: Hodge-podge

SAMONIAN DIGITAL LIBRARY

Dubai, United Arab Emirates

ITEM QUESTION & CHOICES ANSWER REMARK

14 Reduction of sound level is what? A. Reverberation B. White Noise C. Attenuation D. Resonance C

15What is an electronic filtering system in a sound meter that allows meter to largely ignore lower frequency

sounds in a similar fashion to the way our ears do? A. A-Weghting B. Baffle C. Z-Weghting D. Articulation A

16It is the sum total of all noise generated from all direct and reflected sound sources in a space that can

represent an interface to good listening and speech intelligibility. A. White Noise B. Ambient Noise B

17 Low frequency reflections is like what? A. Clicking B. Boominess C. Buzzing D. Cloud B

18 Acoustical horizontal panel attached to the ceiling. A. Baffle B. Helmholtz Resonator C. Cloud D. Cavity C

19 Acoustical vertical panel attached to the ceiling. A. Baffle B. Helmholtz Resonator C. Cloud D. Cavity A

20Damping is the dissipation of vibratory energy in solid media and structures with time or distance. It is

analogous to what acoustical term? A. Sound Blocking B. Sound Filtration C. Sound Absorption C

21 Jet aircraft during take-off at 300 feet distance is how loud? A. 140 dB B. 110 dB C. 120 dB D. 130 dB D

22 Rapid succession of sound is what? A. Echo B. RT C. Flutter D. Drapery C

23What is a sound transmission rating obtained under real-life conditions? A. Shock Sound Transmission Class (SSTC) B. Field Sound Transmission Class (FSTC) C. Sound Transmission Class (STC) B

24 In an acoustical treatment plan for rooms, which is highly absorbent? A. Live End B. Dead End A

25

Bunso is watching cartoons inside the Movie Room constructed with drywall partitions. Ate is studying in

her bedroom adjacent the Movie Room. Will ate hear what Bunso is watching? A. Definitely not because

drywall is one of the best attenuators having high STC B. Yes C. Ate will slightly hear the cartoons D. NoC

26

If a factory having a 50.89 decibels is very near the Ninoy Aquino International Airport (NAIA) in Pasay

City, Philippines, having around 120.5 decibels during flight take-off of a small aircraft at 280 feet, and the

factory is said to be located along EDSA having around 110 decibels of non-rush hour vehicle traffic, how

many is the total noise? A. 120.50 B. 121.81 C. 124.5 D. 120.87

D

27To absorb high frequency sounds, what material is best to use? A. Textured Glass B. Acoustic Cloud C.

Double-Glazed Tempered Glass D. Carpet Tiles E. Linoleum Flooring D

28 In an acoustical treatment plan for rooms, which is reflective and diffusive? A. Live End B. Dead End B

29Quiet curtains are commonly called in fabrications, manufacturing factories and linen stores as what? A.

Cloud B. Drapery C. Baffle D. Acoustic Foam B

30To absorb low frequency sounds, what material is best to use? A. Carpet Tiles B. Vitrified Flooring C.

Panel Absorber D. Neoprene Rubbers C

31What is the perceived auditory sensation of sounds expressed in terms of high or low frequency stimulus

of the sound? A. Tone B. Pitch C. Monotone D. Polytone B

32

Since he have been working on Detail Design (DD) of recording studio in Dubai for several years, Filipino

arch. Kyeme is appointed by the company to actually design a studio beside a daycare center. In

choosing the best building partition that attenuates airborne sound, what will arch. Kyeme consider with

regards to the rating of the material he will use? A. NR B. NRC C. STC D. SAC

C

33First ever perfected architectural acoustical treatment is made where? A. Symphony Hall, Boston B.

Fogg Museum C. Symphony Hall, Birmingham D. Sydney Opera House A

DIRECTION: Select the best answer.

EXAMINEE: RATING: TOPIC CODE: AC 03-04ARCHITECTURAL ACOUSTICS

02