Signal processing equipment

Question 1

What is the function of equalizers?

Answer 1

Applies the term to boost and cut circuits. Generally operates in two bands - - low frequency (bass) and high frequency (treble).

Question 2

What are multi-band equalizers?

What is a graphic equalizer?

Answer 2

Input channels on a typical mixer or mixing console. May have two band equalizer or more commonly have three band equalizers.

Simultaneously operate on 8 or more frequency bands.

Question 3

Excessive boost, especially at low frequencies, wastes ___ power, over stresses the drivers, and reduces overall system head room.

Answer 3

amplifier

Question 4

Equalization is the ___ (first/middle/last) step that should be taken in tuning a sound system. Unless a system is carefully designed and set up, the equalization may not accomplish much and may actually ____,

Answer 4

last

make things worse.

Question 5

What are two basic approaches to tuning the system?

Answer 5

1. Bring out the system; feedback is induced and the equalization is then used to knock down individual feedback frequencies.
2. Measure the frequency response and adjust the equalization.

Question 6

A high pass filter (low cut filter) allows all frequencies above a cutoff point to pass through without ____, but frequencies below the cutoff are ____.

Answer 6

attenuation

attenuated.

Question 7

The cutoff point is defined as that frequency where the signal has dropped ___ dB relative to the bandpass region (aka turnover frequency)

Answer 7

3

Question 8

Reverberation occurs naturally in most ___ environments.

Delay refers to one or more distant sound images.

Reverberation is usually ___ to some degree.

Answer 8

indoor

echoes

desired, achieved by means of computers.

Question 9

Compressors and limiters reduce the ___ range. The ___ is designed to prevent signals from exceeding a given threshold. (process only the program peaks).

The ratio of change from input level to output level is known as the ____.

Answer 9

dynamic

limiter

compression ratio

Question 10

What are noise gates used for?

Answer 10

turns off or attenuates its output signal when the input signal falls below an adjustable level. The ___ is designed to prevent signals from exceeding a given threshold. Eliminates low level hiss and noise. Useful for automatically muting temporarily unused microphones. Have automatic or adjustable time for the gain to be reduced.