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Flashcards in science- sound test ugh Deck (26):
1

frequency range in which longitudinal waves occur

sound spectrum

2

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

sound

3

above what you can hear

ultrasonic

4

below what you can hear

infrasonic

5

what does sound transmission need

mechanical disturbance
elastic medium

6

does sound travel in a vacuum?

NO

7

what is the most efficient transmitter of sound?

dense air

8

what propagates sound?

liquids and solid

9

time rate at which sound energy flows through a unit area

itensity

10

faintest audible sound

threshold of hearing

11

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

pitch

12

sound with non periodic wave forms

noise

13

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

music

14

change in pitch produced by relative motion of source and observer

doppler effect

15

lowest frequency making up a sound

fundamental

16

waves of higher frequency

overtones

17

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

harmonics

18

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

quality of sound (timbre)

19

frequency of vibration strings depends on _______________.(4)

length, diameter, tension, and density of strings

20

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

forced vibrations

21

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

resonance

22

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

resonance

23

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

beats

24

____ are called beats

amplitude pulsations

25

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

beat frequency

26

when can hear beats up to ___ per second.

10 per second