Complex Waves

Question 1

Do we listen to one single pure tone or a combination of pure tones

Answer 1

a combination of pure tones

Question 2

What is a complex wave?

Answer 2

any sound that is composed of 2 or more sine waves

Question 3

What is a complex wave that repeats itself over time called?

Answer 3

periodic

Question 4

Is a periodic repetitive?

Answer 4

yes

Question 5

What are periodic complex waves made up?

Answer 5

frequencies are harmonically related, not random

Question 6

With a harmonic relation, each sinusoid in the series must be

Answer 6

an integer multiple of the lowest in the series

Question 7

What is each of the integer multiples is called a

Answer 7

harmonic

Question 8

The brain finds the greatest common divisor of all

Answer 8

harmonics

Question 9

What is the term octave mean

Answer 9

doubling of frequency

Question 10

What is the frequency ratio of an octave

Answer 10

2:1 or 1:2

Question 11

adding frequencies that are harmonically related is “pleasing to the ear” is know as

Answer 11

Consonance

Question 12

What is consonance used to create

Answer 12

positive emotions

Question 13

adding frequencies that are NOT harmonically related is know as

Answer 13

dissonance

Question 14

Dissonance evokes a feeling of

Answer 14

tension or clash

Question 15

combing frequency waves that are close creates a complex wave that _________ & _________ in amplitude

Answer 15

waxes; wanes

Question 16

What causes beats to occur?

Answer 16

changes in amplitude

Question 17

number of beats per second =

Answer 17

difference in Hz between the 2 tones

Question 18

What is a fourier analysis

Answer 18

a mathematical process by which a complex sound is broken down into its individual sound waves

Question 19

Aperiodic complex waves

Answer 19

combinations sounds not harmonically related

Question 20

What are the 2 types of aperiodic complex waves

Answer 20

continuous and transient

Question 21

continuous aperiodic complex waves are described as

Answer 21

ongoing in time and noise

Question 22

transient aperiodic complex waves are described as

Answer 22

short duration; brief acoustic event and click (the shorter the click the broader the spectrum

Question 23

Define noise

Answer 23

unwanted sound

Question 24

What are the types of acoustical noise

Answer 24

white, gaussian, sawtooth, pink

Question 25

describe white noise

Answer 25

all frequencies with equal amplitudes

Question 26

describe gaussian noise

Answer 26

a type of white noise with random amplitudes, amplitudes vary according to normal curve (bell shape),

Question 27

describe sawtooth noise

Answer 27

high frequencies emphasis

Question 28

describe pink noise

Answer 28

low frequencies emphasis

Question 29

distorion is _______

Answer 29

when the output has added frequencies from the input

Question 30

distortion is measured in

Answer 30

percentage

Question 31

distortion can be be the _____ or the ______ of f1 and f2

Answer 31

sum or difference