Chapter 14 AV Systems

Question 1

Name the 4 basic, but
essential elements, of
audiovisual (AV) design
and integration.

Answer 1

1 . The hardware or the physical electronics
connected together
2.The software or programs loaded into
the electronics to perform various AV
tasks
3.The environment or the soace and
infrastructure within which the hardware
and software work.
4.The content, which includes video,
audio, and data material created and
presented using the available software
and hardware
TDMM: Page 14-7

Question 2

What term is used to
describe the action of
molecules pressing closer
together?

Answer 2

Compression
TDMM: Page 14-2

Question 3

How does the human ear
perceive amplitude of a
sound?

Answer 3

As loudness or volume
TDMM: Page 14-3

Question 4

What is the relationship
between the amplitude of a
sound wave and
volume/loudness?

Answer 4

The greater the amplitude of
sound wave, the louder
the sound.
TDMM: Page 14-3

Question 5

HOW IS LOUDNESS MEASURED?

Answer 5

In decibels of sound
pressure level (dB SPL)
TOMMI Page 14-3

Question 6

What is the dynamic range
of hearing for humans?

Answer 6

From the threshold of hearing to
the threshold of pain
(0 to 120 dB SPL)
TOMMI Page 14-3

Question 7

What term is used to
express a waveform’s
position in time compared
with another waveform?

Answer 7

PHASE

Question 8

How is a phase expressed?

Answer 8

In degrees, with 360 degrees
representing a complete cycle of
the wavelength
TDMM: Page 14-4

Question 9

What does it mean if a
wave is said to be 180
degrees out of phase with
another signal?

Answer 9

That one wave is at its
maximum pressure point and
the other is at its minimum
pressure point
TDMM: Page 14-4

Question 10

What phenomenon
can occur when two
mics close to each
other pick up sound at
different times?

Answer 10

Comb filtering
TDMM: Page 14-4

Question 11

How is frequency
measured in most cases?

Answer 11

Hertz (Hz) or cycles per second
TDMM: Page 14-5

Question 12

What type of frequency is
heard as a pure tone
or note?

Answer 12

Single frequencies
TDMM: Page 14-5

Question 13

What is the fundamental
waveform?

Answer 13

A single sine wave
TDMM: Page 14-5

Question 14

What type of waveform
determines the sound
quality?

Answer 14

A complex waveform
TDMM: Page 14-6

Question 15

What is harmonic
distortion?

Answer 15

Disruption of a signal caused by
frequencies in an output signal
that are not present within the
input signal’s fundamental
frequency.
TDMM: Page GO

Question 16

What is wave-particle
duality?

Answer 16

The two theories of light, where
one theory states that light, like
sound, is made of waves of
energy and the states that light
is made of small particles
called photons
TDMM: Page 14-7

Question 17

How are waves of energy
categorized?

Answer 17

By their wavelengths
TDMM: Page 14-7

Question 18

What part of the
electromagnetic spectrum
can the human eye see?

Answer 18

Only a small section of the
electromagnetic spectrum is
visible to the human eye.
This is referred to as
the visible color spectrum.
TDMM: Page 14-7

Question 19

What determines the color
of a light wave?

Answer 19

The frequency
TDMM: Page 14-8

Question 20

What color is at the center
of the visible light
spectrum?

Answer 20

Green
TDMM: Page 14-8

Question 21

How is the amplitude of a
light wave perceived by the
human eye?

Answer 21

As brightness
TDMM: Page 14-8

Question 22

How does amplitude affect
the brightness of a
light wave?

Answer 22

The greater the light wave’s
amplitude, the larger the wave’s
displacement from the midline
and the light’s brightness.
TDMM: Page 14-8

Question 23

Why do light waves have
different tints?

Answer 23

Because they have different
distributions of color
TDMM: Page 14-8

Question 24

What is color temperature?

Answer 24

A scientific measurement for the
distribution of the colors
radiating from a light source,
which is expressed on the
Kelvin scale
TDMM: Page 14-8

Question 25

What is the basis of the Kelvin scale as applied to properties of light?

Answer 25

The color of light emitted when substance is heated.

Question 26

What temperatures are perceived as white?

Answer 26

.3200 K .5400 K *6500 K *9300 K TOMMI Page 14-8

Question 27

What is the color temperature of candle flame?

Answer 27

1850 K TDMM: Page 14-9, Table 14.1

Question 28

What range of color temperatures for photofloods and studio lamps/lights?

Answer 28

3200 to 3350 K TDMM: Page 14-9, Table 14.7

Question 29

What are the color temperatures for horizon daylight and vertical daylight (noon)?

Answer 29

Horizon Daylight: 5000 K Vertical Daylight: 5500 - 6000 K TDMM: Page 14-9, Table 14.1

Question 30

The higher the temperature, the the light.

Answer 30

The higher the temperature, the bluer the light. TDMM: Page 14-9

Question 31

The lower the temperature, the the light.

Answer 31

The lower the temperature, the redder the light. TDMM: Page 14-9