Audio Fundamentals - Rim-3010

Front 1

The amplitude of sound in a room is usually measured in?

Back 1

dB SPL

Front 2

Jerry is planning on upgrading the PA power amplifiers for his band called Jerry's Kids. The power amps he currently has are rated at maximum output of 10 Watts. The power amps he wants to buy are rated at a maximum output of 1,000 Watts. The dB gain going from 10 Watts to 1,000 Watts is about?

Back 2

20 dB

Front 3

An example of an acoustic absorber is?

Back 3

a Helmholtz resonator

Front 4

The reference quantity in the dB formula is?

Back 4

variable depending on the type of dB

Front 5

A pad is?

Back 5

a one or two step volume control.

Front 6

The human ear is most sensitive at which frequency?

Back 6

3 k Hz

Front 7

The cochlea?

Back 7

is fluid-filled & contains hair-like cells

Front 8

dBm is a measurement of?

Back 8

power

Front 9

For high SPL and rough handling the best mic type would be?

Back 9

dynamic/moving coil mics.

Front 10

A ratio of 2 watts to 1 watt would be?

Back 10

3 dB

Front 11

An absorption co-efficient of 1 means?

Back 11

all sound absorbed

Front 12

Microphone level is usually around?

Back 12

– 60 dBu

Front 13

Moving a conductive wire within a permanent magnetic field will cause?

Back 13

induced Voltage

Front 14

Sound travels through air by?

Back 14

compression waves

Front 15

Balanced inputs have what advantage over unbalanced inputs?

Back 15

CMR noise rejection

Front 16

What is the purpose of side and rear entry ports on a microphone?

Back 16

to create a cardioid pickup pattern through destructive interference.

Front 17

A notch filter would have?

Back 17

a very high Q

Front 18

Tinnitus is?

Back 18

a ringing or whistling in the ear

Front 19

In electronic terms "low Z" would stand for?

Back 19

low impedance

Front 20

Sine waves have?

Back 20

no harmonics

Front 21

An absorption co-efficient of 1 means?

Back 21

all sound absorbed

Front 22

Microphone level is usually around?

Back 22

– 60 dBu

Front 23

Moving a conductive wire within a permanent magnetic field will cause?

Back 23

induced Voltage

Front 24

Sound travels through air by?

Back 24

compression waves

Front 25

Balanced inputs have what advantage over unbalanced inputs?

Back 25

CMR noise rejection

Front 26

What is the purpose of side and rear entry ports on a microphone?

Back 26

to create a cardioid pickup pattern through destructive interference.

Front 27

A notch filter would have?

Back 27

a very high Q

Front 28

Tinnitus is?

Back 28

a ringing or whistling in the ear

Front 29

In electronic terms "low Z" would stand for?

Back 29

low impedance

Front 30

Sine waves have?

Back 30

no harmonics

Front 31

What is the wavelength of a 50 Hz sound wave?

Back 31

22.6 ft

Front 32

When might you use the high pass filter provided on some mics?

Back 32

to compensate for proximity effect

Front 33

Sound travels through air by?

Back 33

compression waves

Front 34

The higher the frequency the_____ the wave length?

Back 34

shorter

Front 35

If two sine waves with the same frequency and amplitude but 180 degrees out of phase are combined the resilt will be?

Back 35

cancellation

Front 36

This part of the ear that helps us localize sound by causing comb filtering is the?

Back 36

pinna

Front 37

Moving a conductive wire within a permanent magnetic field will cause?

Back 37

induced Voltage

Front 38

What is the purpose of side and rear entry ports on a microphone?

Back 38

to create a cardioid pickup pattern through destructive interference.

Front 39

Balanced inputs have what advantage over unbalanced inputs?

Back 39

CMR noise rejection

Front 40

Which of the following describes the slope of a filter?

Back 40

dB per octave

Front 41

Most budget mixers as well as home stereos have this kind of EQ for the Treble and Bass?

Back 41

shelving

Front 42

Many control rooms and studio rooms use diffusers to?

Back 42

scatter reflections in different directions

Front 43

When a sound wave strikes a wall the angle of reflection is equal to the angle?

Back 43

of the incidence wave

Front 44

A dual-diaphragm mic would have which special function?

Back 44

various pick up patterns

Front 45

When might you use the high pass filter provided on some mics?

Back 45

to compensate for proximity effect

Front 46

A notch filter would have?

Back 46

a very high Q

Front 47

For high SPL and rough handling the best mic type would be?

Back 47

dynamic/moving coil mics.

Front 48

In electronic terms "low Z" would stand for?

Back 48

low impedance

Front 49

Sine waves have?

Back 49

no harmonics

Front 50

Which frequency is most likely to diffract around a large obstacle?

Back 50

20 Hz

Front 51

For a given center frequency as the Q grows larger the bandwidth?

Back 51

gets smaller

Front 52

440 Hz is the fundamental frequency of concert "A". A note 2 octaves above concert "A" will have a fundamental frequency of?

Back 52

1,760 Hz

Front 53

Which of the following is an example of coincident stereo mic technique?

Back 53

two bi-directional mics with a 90 degree angle and no horizontal spacing

Front 54

In the free field if you double the distance from the sound source the dB SPL will go down?

Back 54

6 dB SPL

Front 55

Anthony was listening to his IPod at a comfortable level of about 80 dB of SPL. Suddenly his Mom powers up her new industrial vacuum cleaner outside his room causing him to miss his favorite part of the song. This is an excellent example of?

Back 55

masking