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Katie Science Tests > Test 8 > Flashcards

Test 8 Flashcards

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1
Q

The sound that occurs when a lip in the path of a flow of air causes regular pulses of compression, as in an organ pipe, is a(n)

A

edge tone

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2
Q

What is the most versatile and widely played instrument in modern times?

A

piano

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3
Q

Sound with frequency below the range of human hearing is ? sound.

A

infrasonic

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4
Q

Sound that can be heard is ? sound

A

audible

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5
Q

When two notes interfere harmoniously, the result is known as ?

A

consonance

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6
Q

When a driving frequency and a natural frequency are the same or nearly the same, they are in?

A

resonance

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7
Q

The number of waves that pass a given point per unit time is the wave’s?

A

frequency

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8
Q

The maximum distance that particles are displaced by a wave is the wave’s?

A

amplitude

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9
Q

The time needed for one wave to pass is the wave’s?

A

period

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10
Q

What is random sound with no intended pattern?

A

noise

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11
Q

The law of reflection states that the angle of incidence is ? the angle of reflection.

A

equal to

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12
Q

A periodic back-and-forth motion that transmits energy is a wave.

A

true

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13
Q

The effect of frequency on the way our ear perceives sound is loudness

A

pitch

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14
Q

Sounds produced by a musical instrument at higher frequencies than the fundamental are called edge tones.

A

overtones

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15
Q

The set of frequencies at which an object vibrates are its natural frequencies.

A

true

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16
Q

A musical instrument’s distinctive sound quality is its pitch.

A

timbre

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17
Q

The family of instruments in which pitch is varied by opening and closing holes in a tube is the brass.

A

woodwind

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18
Q

Sound heard distinctly after being reflected from an object.

A

echo

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19
Q

Multiple reflections causing a persistence of sound not heard as separate sounds.

A

reverberation

20
Q

Loud noise caused by a shock wave

A

sonic boom

21
Q

Strength of a sound wave

A

intensity

22
Q

Violent compression pulse caused by an object moving faster than the speed of sound.

A

shock wave

23
Q

Effect of sound-wave strength on the way the human ear perceives sound.

A

loudness

24
Q

Change in a wave’s direction when passing from one substance into another.

A

refraction

25
Q

Name the two kinds of waves interference

A

constructive

destructive

26
Q

What is a series of organized sound waves with specific pitches that have been deliberately arranged?

A

music

27
Q

What is a hollow body that reverberates sound waves produced by an instrument to make the sound louder?

A

resonator

28
Q

What is the substance through which a wave transfers energy called?

A

medium

29
Q

What phenomenon is vibrations traveling through a medium in the form of longitudinal pressure waves?

A

sound

30
Q

The spreading out of a wave after it passes through a narrow opening is called?

A

diffraction

31
Q

The mutual reinforcement or cancellation that occurs when two or more waves meet is?

A

interference

32
Q

The change in the course of a wave as a result of a collision with an object is called?

A

reflection

33
Q

The most dominant sound produced when a musical instrument plays a single note is the?

A

fundamental

34
Q

What is the difference in pitch between a note and a second note that has twice the frequency of the first note?

A

octave

35
Q

Which family of instruments includes the trumpet and tuba?

A

brass

36
Q

Which family of instruments are played by being struck?

A

percussion

37
Q

The unit used to measure sound intensity in a way that reflects how our ears perceive sound is the?

A

decibel

38
Q

What is the SI unit of frequency?

A

hertz

39
Q

In music, the distance between two notes is called a(n)?

A

interval

40
Q

A change in the sound frequency caused by an object’s motion is the?

A

Doppler effect

41
Q

The length of a wave is the?

A

wavelength

42
Q

A system that uses sound to detect underwater objects is?

A

sonar

43
Q

The process of dissipating the energy of sound waves in matter is?

A

absorption

44
Q

The frequency relationships between the fundamental and overtones are described by the?

A

harmonic series

45
Q

A sound of definite pitch, produced by a singing voice or a musical instrument, is a(n)?

A

note

46
Q

Find the speed of a wave that has a wavelength of 6.0 m and a frequency of 2.0 Hz.

A

Use v = ^f
^ = wavelength
f = frequency

47
Q

Calculate the frequency and period of a wave with a speed of 10 m/s and a wavelength of 5.0 m.

A

Use f = v/^ for frequency Use T = 1/f
^ = wavelength 1 = 1
v = speed f = frequency

Katie Science Tests (11 decks)

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