Studied by 1 person

0.0(0)

Get a hint

Hint

1

Period

Time in seconds (donāt forget to convert msec to sec)

New cards

2

Periodic

Tonal, have pitch, vowels, integer multiple harmonic

New cards

3

Aperiodic

Noisy, no tone, no pitch, static, consonants, no clear organization

New cards

4

Pure sound aka sine wave

Not real in nature, only made by a machine, ONE sound

New cards

5

Find wavelengths

Wave length = c / f

New cards

6

What is the speed of sound ( c ) ?

343 m/sec

New cards

7

Find the frequency

F = 1/t

New cards

8

How to find the period of a complex periodic sound

Find the period of the lowest frequency t=1/f

New cards

9

Wavelength

Distance in meters (donāt forget to convert mm to m)

New cards

10

Convert 2 msec into seconds

.002

New cards

11

How do sound waves travel via air

Molecule vibration in an elastic medium

New cards

12

Compression

Positive pressure, top of wave

New cards

13

Rarefaction

Negative pressure, bottom of wave

New cards

14

When sounds fades, due to friction, its called

Damping

New cards

15

Sound wave propagation

Sound waves travel in all directions from the sound source

New cards

16

Frequency

Cycles per second, expressed in Hz

New cards

17

What is audiology?

Came from noise exposure from modern weaponry

New cards

18

What does presbycusis mean?

Age related hearing loss

New cards

19

What is hearing loss associated with?

Falls, depression, isolation, loneliness, reduced quality of life

New cards

20

Acoustic energy

Air molecule vibration

New cards

21

Mechanical energy

Ear drum, biological microphone

New cards

22

Electrochemical energy

Nervous system

New cards

23

Vibration

Tuning fork, a to-and-from motion

New cards

24

Properties of sound source vibration

Equilibrium (resting position)

Maximum displacement in one direction

Maximum displacement in another direction

Elasticity: wants to go back to equilibrium

Start at resting position, vibrates and restoring force because of inertia over shoots in the maximum direction and repeats until returning to resting

New cards

25

What is a vibration

A disturbance in both space and time (a wave)

New cards

26

Inertia

The tendency of an object set into motion to remain in motion

New cards

27

Elasticity

A physical property where a deformed object returns to its original form (related to restoring force)

New cards

28

Restoring force

The force that opposes the deformation of an elastic material or medium

New cards

29

Elasticity does not equal flexibility

Steel strings are more elastic than rubber strings because they resist more to the external force

New cards

30

Can you hear in a vacuum such as space?

Since there are no air molecules present to vibrate, there is no sound. There is no medium

New cards

31

The Doppler effect

Think of what you hear when a car comes towards you, away from you, or passes you left to right

New cards

32

Where do decibels come from

Itās a logarithmic scale to pascals

New cards

33

What is 0 decibels

Average quietest noise people can hear āreference valueā

New cards

34

New cards

35

New cards

36

New cards

37

New cards

38

New cards