Acoustics

Question 1

Acoustics

Answer 1

Study of physical properties of sound

Question 2

physical sound

Answer 2

frequency
intensity
timing
sensation of vibration

Question 3

perception sound

Answer 3

auditory interpretation
how you experience sound in your brain
need physical sound

Question 4

Waves

Answer 4

succession of molecules being shoved together and pulled apart
moving back and forth

Question 5

compression/condensation

Answer 5

shoved together

Question 6

rarefaction

Answer 6

pulled apart

Question 7

transverse waves (perpendicular)

Answer 7

up and down

Question 8

longitudinal waves (parallel)

Answer 8

back and forth
sound traveling through the ear

Question 9

waveforms
(amplitude and time)

Answer 9

one complete compression and one complete rarefaction
cycle

Question 10

amplitude

Answer 10

greatest distance the mass goes from resting position

Question 11

peaks

Answer 11

compression
all squished together

Question 12

simple sounds

Answer 12

all energy at one frequency

Question 12

complex sounds

Answer 12

energy at more than one frequency

Question 12

frequency

Answer 12

cycles/second
Measured in hertz

Question 12

how fast does sound travel

Answer 12

340 m/sec through medium of air

Question 12

wavelength formula

Answer 12

v/f

Question 12

velocity

Answer 12

speed of which sound travels
340 m/sec

Question 13

period

Answer 13

time required for each cycle
time/cycles or 1/frequency

Question 14

higher pitch =

Answer 14

more cycles per second

Question 15

2000 hz: how many cycles per second?

Answer 15

2000 cycles/second

Question 16

2000 hz: how long does it take for one cycle to occur?

Answer 16

1/2000 seconds

Question 17

length

Answer 17

as length increase, frequency decreases

Question 18

mass

Answer 18

as mass increases, frequency decreases

Question 19

stiffness

Answer 19

the flexibility of a mass
as stiffness increases, frequency increases

Question 20

low frequencies have _____ wavelengths

Answer 20

long
good at traveling around things

Question 21

high frequencies have ____ wavelengths

Answer 21

short

Question 22

amplitude determines

Answer 22

intensity (loudness)

Question 23

intensity

Answer 23

measure strength of sound
measured in power or pressure
greater force = greater intensity = greater amplitude

Question 24

how can intensity be expressed?

Answer 24

sound pressure or sound power

Question 25

decibel (dB)

Answer 25

unit of measure of intensity used in acoustics and audiometrics
1/10 of a bel

Question 26

frequency unit

Answer 26

hz

Question 27

frequency psychological

Answer 27

pitch

Question 28

intensity unit

Answer 28

dB

Question 29

intensity psychological

Answer 29

loudness

Question 30

duration unit

Answer 30

seconds

Question 31

duration psychological

Answer 31

how long something lasts

Question 32

phase

Answer 32

relationship between two or more waves

Question 33

what happens when a phase is 180 degrees?

Answer 33

it cancels sound out