Help pls... 100points 1
The pitch of a sound depends on
a. frequency
b. intensity
c. amplitude
d. quality
2
The loudness of a sound depends on
a. frequency
b. intensity
c. overtones
d. timbre
3
The number of sound waves per unit time is called
a. amplitude
b. wavelength
c. speed
d. frequency
4
The blending of fundamental tone and overtones produces a sound's
a. intensity
b. pitch
c. timbre
d. loudness
5
Sonar is used
a. to locate objects in water
b. to determine underwater distances
c. for both a and b
d. for neither a nor b
6
Sounds of frequencies below 20 Hz are called
a. fundamentals
b. overtones
c. ultrasonic sounds
d. infrasonic sounds
7
A sound is music if it has
a. a definite pitch
b. a pleasing quality
c. rhythm
d. all of these characteristics
8
The stirrup is a part of the
a. outer ear
b. middle ear
c. inner ear
d. cochlea
9
An example of a percussion instrument is a (an)
a. trumpet
b. harp
c. drum
d. flute
10
The speed of sound depends on
a. temperature
b. density
c. elasticity
d. all of these factors
11
Sounds with frequencies above 20,000 Hz are called .
12
The science of sound is called .
13
High-frequency waves are used in a sound navigation and ranging
system called .
14
Sounds produced when sections of a string vibrate separately are
called .
15
Sound without pleasing quality, identifiable pitch, and repeating
patterns is called .
16
The speed of sound decreases with increasing temperature.
a. true
b. false
17
Sound waves are transverse.
a. true
b. false
18
The decibel is a unit of pitch.
a. true
b. false
19
A change in the pitch of a sound due to motion of source or
receiver (observer) is called the Doppler effect.
a. true
b. false
20
Guitars and cellos are examples of percussion instruments.
a. true
b. false