Sound Properties and Hearing

Question 1

________ waves are partially transverse and partially longitudinal

Answer 1

Water or sea

Question 2

__________ consist of cycles or patterns that are produced over and over again by the source; with simple harmonic motion

Answer 2

Periodic waves

Question 3

________ is a vibration of molecules that goes back and forth kaya parang wave yung graph

Answer 3

Sound

Question 4

The _________ is the maximum excursion of a particle of the medium from the particle undisturbed position

Answer 4

amplitude A

Question 5

The __________ is the horizontal length of one cycle of the wave

Answer 5

wavelength

Question 6

The _________ is the time required for one complete cycle.

Time of one cycle, unit is sec.

Answer 6

period

Question 7

The _________ is related to the period and has units of Hz (Hertz), or s-1 .

_____ number of cycles per second

f = 1/T

Answer 7

frequency

Question 8

20 Hertz means that the vibration goes 20 times back and forth in one second..

High frequency = faster

Question 9

Bigger instrument = higher frequency or lower frequency?

Answer 9

lower frequency

Question 10

_______ travels through gases, liquids, and solids at considerably different speeds

Answer 10

Sound

Question 11

__________ is each person’s subjective perception of a sound wave, which cannot be directly measured

Answer 11

Pitch

Question 12

The __________ is the number of cycles per second.

Answer 12

frequency

Question 13

Does higher frequency mean higher pitch or lower pitch?

Answer 13

higher pitch

Question 14

When the sound is near you, the frequency tends to ________ and when it goes far from you, the frequency tends to _______

Answer 14

Compress; expand

Question 15

What are the two types of waves?

_____ - perpendicular to the direction of the wave
_____ - parallel to the direction of the wave

Answer 15

Transversal wave

Longitudinal wave

Question 16

Higher frequency; short-wavelength; lots of waves; high sound

Answer 16

true

Question 17

Lower frequency; longer wavelength; few waves

Answer 17

true

Question 18

Sound waves are examples of the longitudinal or transverse waves?

Answer 18

longitudinal

Question 19

Does Individual air molecules are carried along with the wave??

Answer 19

No, because air molecules ay yung hininga na hindi naman nasasama sa wave

Question 20

A sound with a single frequency is called a _______

Ex: yung pag sasalita ng isang tao ay nde pure tone

Answer 20

pure tone

Question 21

The brain interprets the frequency in terms of the subjective quality called _________

Answer 21

pitch

Question 22

_________ is an attribute of a sound that depends primarily on the pressure amplitude of the wave

Answer 22

Loudness

Question 23

Change in pressure corresponds to _________

Answer 23

loudness

Question 24

Increase in amplitude = increase in ______

Answer 24

volume

Question 25

P-waves = longitudinal wave S-wave = transverse wave Different speed ng wave pag may Earthquake because of there are different materials ang Earth Ex: speed of wave is faster in granite than in sediments

Question 26

Speed of Sound are affected by: ______________ ______________

Answer 26

Density or material | temperature

Question 27

Does the speed of sound depend on frequency?

Answer 27

no ; only density and temperature affect the speed of sound

Question 28

low-frequency sounds must have a greater wavelength or lower wavelength?

Answer 28

Greater wavelength

Question 29

lower-frequency sounds are emitted by the large speaker, called a ________

Answer 29

woofer

Question 30

higher-frequency sounds are emitted by the small speaker, called a _________

Answer 30

tweeter

Question 31

PART 2: SOUND INTENSITY

Question 32

Sound waves carry energy that can be used to do work The amount of energy transported per second is called the _______ of the wave

Answer 32

power

Question 33

The _________ is defined as the power that passes perpendicularly through a surface divided by the area of that surface.

Answer 33

sound intensity

Question 34

What is the threshold of hearing of humans? Or the SMALLEST SOUND INTENSITY that human can hear?

Answer 34

1000 Hz tone that corresponds to 1x10^-12W/m2

Question 35

continuous exposure to intensities greater than _______ can be painful

Answer 35

1W/m2

Question 36

The __________ is a measurement unit used when comparing two sound intensities

Answer 36

decibel (dB)

Question 37

The ________ is the change in frequency or pitch of the sound detected by an observer because the sound source and the observer have different velocities with respect to the medium of sound propagation

Answer 37

Doppler effect

Question 38

When the truck is at rest, the frequency is ________.

Answer 38

constant

Question 39

When the truck is moving towards you, frequency ________ and wavelength _________

Answer 39

increases ; compress

Question 40

When the truck is moving away from you, the frequency _______ and the wavelength _______

Answer 40

Decreases; expands

Question 41

What is the relationship between wavelength and frequency?

Answer 41

inversely related

Question 42

probe that are used in the removing of tumor

Answer 42

Cavitron Ultrasonic Surgical Aspirator (CUSA)

Question 43

measure the speed of the blood flow using transmitting and receiving elements and detect fetal heart

Answer 43

Doppler Flow meter

Question 44

you need specific intensity level (dB) is needed for you to be able to hear certain frequency of sounds

Answer 44

TRUE

Question 45

When the waves are same with each other and are said to be in exactly in phase

Answer 45

Constructive interference

Question 46

Where waves are said to be exactly out of phase | So if two waves add up, it will result to just flat wave

Answer 46

Destructive Interference