acronyms Flashcards
(87 cards)
1
Q
SPL
A
Sound pressure level
2
Q
RMS
A
root mean square
3
Q
PPM
A
Peak Program Meter
4
Q
EQ
A
Equalizer
5
Q
RF
A
radio frequency
6
Q
UHF
A
Ultra High Frequency
7
Q
IR
A
impulse response
8
Q
SNR
A
signal to noise ratio
9
Q
DSP
A
digital signal processor
10
Q
DCA
A
digitally controlled amplifier
11
Q
DI
A
direct input
12
Q
HPF
A
high pass filter
13
Q
LPF
A
low pass filter
14
Q
LUFS
A
Loudness Units Relative to Full Scale
15
Q
VLF
A
very low frequency
16
Q
ELF
A
extremely low frequency
17
Q
A
18
Q
Sine wave
A
A smooth periodic oscillation representing sound.
19
Q
Cycle frequency
A
Rate at which sound waves complete cycles.
20
Q
Amplitude
A
Height of a sound wave, indicating loudness.
21
Q
Sound Pressure Level (SPL)
A
Measurement of sound intensity in decibels.
22
Q
Decibels
A
Logarithmic unit measuring sound intensity.
23
Q
Loudness
A
Perceived intensity of sound by human ears.
24
Q
10 dB difference
A
Represents tenfold increase in sound energy.
25
~3 dB difference
Indicates doubling of sound energy.
26
~6 dB difference
Represents doubling of perceived loudness.
27
RMS
Root mean square; average sound pressure level.
28
LUFS
Loudness Units relative to Full Scale measurement.
29
PPM
Peak Program Meter; measures absolute sound peaks.
30
Frequency
Rate of oscillation in sound waves.
31
Reflection
Redirection of sound waves in original form.
32
Absorption
Energy loss of sound wave to the environment.
33
Reverb
Multiple sound reflections occurring closely together.
34
Reverberation Time
Duration for sound to be absorbed completely.
35
Sound Absorption Surfaces
Materials that reduce sound reflection in spaces.
36
Standing Waves
Oscillating waves not progressing through space.
37
Coupled Acoustics
Shared acoustic properties between connected spaces.
38
Human hearing range
Audible frequencies from 20 Hz to 20 kHz.
39
Comfortable listening level
Recommended SPL between 70-85 dB.
40
Physical limits of playback hardware
Constraints affecting sound reproduction quality.
41
What is a transducer?
Converts energy from one form to another.
42
What is a dynamic microphone?
No power needed, less sensitive, high def capacity.
43
What is a condenser microphone?
Requires power, more sensitivity, lower dynamic capacity.
44
What is phantom power?
48v power supplied to condenser microphones.
45
What does LDC stand for?
Large diaphragm condenser, enhances harmonics in sound.
46
What does SDC stand for?
Small diaphragm condenser, captures sound broadly.
47
What is a ribbon microphone?
Uses metal ribbon, high sensitivity, no power needed.
48
What is a cardioid pattern?
Front pickup pattern, minimizes side and back noise.
49
What is a supercardioid pattern?
Front and slight back pickup, 20% rear sensitivity.
50
What is a hypercardioid pattern?
Front and significant back pickup, 50% rear sensitivity.
51
What is an omnidirectional pattern?
Picks up sound equally from all directions.
52
What is a figure 8 pattern?
Front and back pickup, minimal side sensitivity.
53
What is a shotgun microphone?
Highly directional, focused pickup pattern.
54
What is frequency response?
Range of frequencies a microphone can pick up.
55
What is a wireless microphone system?
Includes transmitter, receiver, and microphone element.
56
What is a transmitter?
Mic pack worn by actors for wireless audio.
57
What is a receiver?
Outputs line-level signal from wireless system.
58
What is a capsule in a microphone?
The microphone component itself.
59
What is an antenna?
Required for both transmitter and receiver operation.
60
What does UHF stand for?
Ultra-High-Frequency, 300MHz - 3GHz radio spectrum.
61
What is intermodulation distortion?
Frequencies combine and become scrambled.
62
What does SNR stand for?
Signal to Noise Ratio, measures signal strength.
63
What is a Faraday cage?
Metal barrier blocking radio signals between devices.
64
What is gain staging?
Adjusting levels to optimize signal quality.
65
Impedance
Nominal resistance of speakers, 4-16 ohms.
66
Ohm's Law
Current increases as impedance decreases at constant voltage.
67
Power Handling
Maximum power a speaker can handle without damage.
68
Sensitivity
Sound Pressure Level at 1W, 1m distance.
69
Driver Configuration
Type of loudspeaker driver: 2-way, 3-way.
70
Frequency Response
Speaker's effect on signal frequency balance.
71
Frequency Range
Typical range: 20 Hz to 20 KHz (+/- 3 dB).
72
Dispersion Pattern
Coverage area and sound directionality of speaker.
73
-6dB Point
Level drop indicating dispersion at specific frequency.
74
Speaker Definition
Device converting electrical signals into sound waves.
75
Driver
Transducer converting electrical audio signals to sound.
76
Crossover Network
Filters audio signals by frequency for drivers.
77
Box
Housing for drivers and crossover network.
78
Cone
Visible part of driver that creates sound waves.
79
Voice Coil
Coil inside magnet causing cone movement.
80
Capacitors
Store electrical energy in crossover networks.
81
Inductors
Store energy in magnetic fields in crossover networks.
82
Sound Cancellation
Prevented by box trapping rear sound waves.
83
Speaker Size
Varies to manage sound vibrations effectively.
84
Loudspeakers
Standard speakers for audio reproduction, versatile use.
85
In-wall Speakers
Mounted speakers for hidden sound production.
86
Subwoofers
Designed specifically for low-frequency sound reproduction.
87
Types of Speakers
Includes Bluetooth, bookshelf, floor-standing, satellite, outdoor.
