Physics

Front 1

If you hear two sounds with frequencies 50 Hz and 3000 Hz, at the same intensity level 70 dB, which will sound loudest?

Back 1

3000 Hz

Front 2

The part of the ear, which helps in funneling short-wave sound in toward the eardrum is called

Back 2

pinna

Front 3

The ossicles are part of

Back 3

middle ear

Front 4

What three intervals are contained in a chord C(4)/E(4)/G(4)

Back 4

major third, minor third, perfect fifth

Front 5

In equal-tempered tuning the interval C(4)-F(4) has the ratio of frequencies

Back 5

1.33

Front 6

In equal-tempered tuning the frequency (in Hz) of the note one tone above 220 Hz is

Back 6

220x1.059x1.059

Front 7

The frequencies of the first 3 natural modes of a vibrating system are f(1), 2.04 f(1), which deviate only slightly from the harmonic series. These are typical values for

Back 7

one of the uppermost strings of a piano.

Front 8

If sine waves of frequency 120, 300, 600, 900 and 60 Hz are added together, what is the frequency of the resulting complex wave?

Back 8

60 Hz

Front 9

The complex waveform repeats every 4 ms. What are the frequencies of its first three Fourier harmonics?

Back 9

250, 500, 750 Hz

Front 10

Wave A is a 10 Hz sawtooth and wave B is 25000 Hz triangular wave

Back 10

A is audible but B is not

Front 11

In equal-tempered tuning the interval perfect 4th has the ratio of frequencies

Back 11

1.33

Front 12

The amplitude of the fundamental harmonic in a square wave is 20. The amplitude of second harmonic in this wave is

Back 12

20

Front 13

The amplitude of the fundamental harmonic in a square wave in 20. The amplitude of fifth harmonic in this wave is

Back 13

4

Front 14

The amplitude of the fundamental mode in a simple sawtooth wave is 60. The amplitude of fourth harmonic in this wave is

Back 14

15

Front 15

Sounds of frequencies 100 Hz, 200 Hz, and 153.3333 Hz and of waveforms of sine waves being combined produce

Back 15

aperiodic waves

Front 16

The using of a vibrato results in

Back 16

a broadening of existing lines

Front 17

The audible range of sine waves is roughly 20 to 20,000 Hz. Wave A is 5 Hz square wave and B is 25,000 Hz square wave.

Back 17

Neither A nor B are audible.

Front 18

Square wave

Back 18

odd harmonics

An= A1/n; In= I1/n2

Front 19

Triangular wave

Back 19

odd harmonics

An= A1/n2; In=I1/n4

Front 20

Sawtooth wave

Back 20

odd and even harmonics

An= A1/n; In= I1/n2

Front 21

Modulated tones

Back 21

vibrato and tremolo

Front 22

Vibrato

Back 22

Frequency modulated

Front 23

Tremolo

Back 23

Amplitude modulated

Front 24

Percussion Instruments

Back 24

bars and stripes

frequency is indirectly proportional to the length of a bar squared

Front 25

Membrane

Back 25

Circular modes (antinode in the center), radical modes (node in the center).

Front 26

Effective frequency of a membrane

Back 26

2/T

Front 27

Natural modes of a thin string

Back 27

fn = nv/2L; ln = l1/n; l1=2L.

Front 28

Outer ear

Back 28

pinna, outer canal, eardrum

Front 29

middle ear

Back 29

ossicles, eustachian tube

Front 30

inner ear

Back 30

auditory nerve, cochlea

Front 31

Phons

Back 31

Loudness level is the same number as the sound intensity level for 1000 Hz in dB.

Front 32

Sone

Back 32

the unit of loudness which is defined as the loudness of a 1000 Hz tone at a sound level of 40 dB

Front 33

Equal temperament

Back 33

a musical temperament, or a system of tuning, in which every pair of adjacent pitches is separated by the same interval. In other words, the pitches of an equal temperament can be produced by repeating a generating interval.

Front 34

Intervals

Back 34

can be vertical or harmonic if the two notes sound simultaneously, or horizontal, linear, or melodic if they sound successively. Three or more notes sounding together form a chord containing the combination of several intervals.

Front 35

Musical Intervals

Back 35

(third, fifth, octave) white keys

(minor, major, augmented, diminished) black keys

Front 36

Harmonic Series

Back 36

a set of frequencies consisting of a fundamental and the harmonics related to it by an exact fraction, a series of values in harmonic progression

Front 37

Periodic wave

Back 37

a continually oscillating motion.

Front 38

The striking of a circular membrane exactly at the center will excite

Back 38

all circular modes

Front 39

The frequency of the first natural mode of some string is 200 Hz. What is the frequency of the fifth mode?

Back 39

1000 Hz

Front 40

For a piano the longest decay time demonstrate

Back 40

bass