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Introduction to Acoustics

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

What is a "medium" in Physics

a)

When the sound wave goes in between two things

b)

The material a wave travels through

c)

A repeating disturbance that transfers energy over a distance

d)

When air particles vibrate

2.

Which of the following is a "medium" for sound waves?

a)

Compression

b)

Rarefaction

c)

Air

d)

Steel

3.

Which medium will sound travel through the fastest?

a)

Air

b)

Metal

c)

Water

d)

Space

4.

Fill in the blank: Sound Waves travel fastest through solids because the atoms are ___________ compared to atoms in liquids and gases

a)

Closer together

b)

Farther apart

c)

Harder

d)

Smaller

5.

Fill in the blank: A sound that is 40 dB is _______ than a sound that is 10 dB

a)

3 times louder

b)

4 times louder

c)

6 times louder

d)

8 times louder

6.

How does the decibel scale work?

a)

+10 dB = +10 louder

b)

x2 dB = +10 louder

c)

+10 dB = x2 louder

d)

x2 dB = x2 louder

7.

Which color graph has the smallest amplitude

a)

Blue

b)

Orange

c)

Green

d)

Red

8.

What is "frequency"?

a)

Number of times wave repeats in image

b)

Number of times wave repeats in 1 second

c)

Length of one wave

d)

How often the wave happens

9.

Which graph has a longer wavelength?

a)

Top graph

b)

Bottom graph

c)

Same wavelength

10.

________is a science that deals with the production, control, transmission, reception, and effects of sound

a)

Sound

b)

Sound System

c)

Acoustics

d)

Sound Physics

11.

Acoustics is classically divided into sound and _______

a)

infrasonic waves

b)

vibration

c)

oscillation

d)

ulfra-sonic waves

12.

Hard surfaces, such as ceramic tile, gypsum board, or wood, tend to _______ sound waves, causing ‘echo’.

a)

transmit

b)

diffract

c)

refract

d)

reflect

13.

____ is used to describe sound waves that are reflected off of surfaces

a)

reflection

b)

reverberation

c)

vibration

d)

oscillation

14.

Dense, massive, materials, such as concrete or brick, tend to _______ sound waves through the material.

a)

transmit

b)

reflect

c)

absorb

d)

obstruct

15.

Soft surfaces, such as textiles, and bath insulation, tend to _______ sound waves, preventing them from further motion

a)

transmit

b)

reflect

c)

diffract

d)

absorb

16.

____ frequency sound waves are not capable of being transmitted through massive, heavy, material

a)

low

b)

medium

c)

very low

d)

high

17.

____ frequency sound waves are transmitted through massive materials.

a)

low

b)

medium

c)

very high

d)

high

18.

Vibration describes energy transmitted through denser materials such as wood, steel, stone, dirt, drywall or anything besides a _____

a)

water

b)

air

c)

fluid

d)

vacuum

19.

Vibration is not heard as much as felt, due to its _______frequency

a)

very high

b)

very low

c)

extremely low

d)

extremely high

20.

______is below the range of most human hearing

a)

ultra-sonic

b)

infra-sonic

c)

super-sonic