Hofstra power point's

Question 1

What is sound

Answer 1

Vibrations travel through air or another medium

Question 2

How is sound produced

Answer 2

By continuous and regular vibrations, as opposed to noise

Question 3

Vibrations is a general term used to?

Answer 3

describe rapid back and forth movement around a more or less fixed location: cyclical or haphazard

Question 4

Oscillations occur?

Answer 4

around an equilibrium point, may be periodic EX. pendulum or random EX. marbles on floor

Question 5

Frequency is the ______ of the period which is measured in ____

Answer 5

reciprocal
Hertz

Question 6

What are 3 examples of forced vibrations

Answer 6

Loudspeaker
Earphones
Bone oscillator

Question 7

Sound waves? sound waves are _____ waves

Answer 7

Pattern of disturbance caused by the energy traveling away from the source of the sound

Longitudinal

Question 8

Decibles

Answer 8

Unit for expressing the ratio of two amounts of electric or acoustical signal power equal to 10 times the common logarithm of this ratio

Question 8

What is 0

Answer 8

0 dB IL or SPL mean that the measured sound = the reference value

Question 8

hearing level is the level of?

Answer 8

stimulus as referred to its level at which is taken to be the threshold of the normal hearing listener

Question 9

Sensation level

Answer 9

absolute intensity of a sound measured in decibles relative to the absolute threshold of the listener

Ex. 40 dB SPL 40 dB above their threshold

Question 9

reference value indicates?

Answer 9

the softest sound that an average healthy adult can hear