science- sound test ugh

Question 1

frequency range in which longitudinal waves occur

Answer 1

sound spectrum

Question 2

a range of compression wave frequencies which people can hear (audio spectrum)

Answer 2

sound

Question 3

above what you can hear

Answer 3

ultrasonic

Question 4

below what you can hear

Answer 4

infrasonic

Question 5

what does sound transmission need

Answer 5

mechanical disturbance

elastic medium

Question 6

does sound travel in a vacuum?

Answer 6

NO

Question 7

what is the most efficient transmitter of sound?

Answer 7

dense air

Question 8

what propagates sound?

Answer 8

liquids and solid

Question 9

time rate at which sound energy flows through a unit area

Answer 9

itensity

Question 10

faintest audible sound

Answer 10

threshold of hearing

Question 11

characteristic of a sound that depends on the frequency that the ear recieves

Answer 11

pitch

Question 12

sound with non periodic wave forms

Answer 12

noise

Question 13

sound with approximately period wave forms, unless the intensity is too high

Answer 13

music

Question 14

change in pitch produced by relative motion of source and observer

Answer 14

doppler effect

Question 15

lowest frequency making up a sound

Answer 15

fundamental

Question 16

waves of higher frequency

Answer 16

overtones

Question 17

the fundamental and the vibrational modes having f that are whole # multiples of the fundamental

Answer 17

harmonics

Question 18

depends on the # of harmonics produced at the same time and their relative itensities

Answer 18

quality of sound (timbre)

Question 19

frequency of vibration strings depends on _______________.(4)

Answer 19

length, diameter, tension, and density of strings

Question 20

a vibrating source forces another object to vibrate producing a more intense sound

Answer 20

forced vibrations

Question 21

occurs when the natural vibration rates of two objects are the same or equal to one of the objects harmonics

Answer 21

resonance

Question 22

occurs when the natural vibration rates of two objects are the same or equal to one of the objects harmonics

Answer 22

resonance

Question 23

caused by waves trains of slightly different f traveling in the same direction

Answer 23

beats

Question 24

____ are called beats

Answer 24

amplitude pulsations

Question 25

number of beats per second equals the difference between the f of the component waves

Answer 25

beat frequency

Question 26

when can hear beats up to ___ per second.

Answer 26

10 per second