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We have compiled a list of audio, video and home theater terms that you
might find helpful as you research your next purchase.
From A-Z, this glossary should have all the answers.
Glossary of Terms:
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E
EBP
Efficiency Bandwidth Product. A guide that helps a designer determine whether a driver is more suitable for a sealed or ported enclosure. EBP of less than 50 indicates the driver should be used in a sealed, 50 - 90 indicates flexible design options, over 90 indicates best for a ported enclosure. EBP = Fs / Qes
EDTV
Enhanced Digital Television
EDTV refers to a complete product/system with the following minimum performance attributes:
- Receiver: Receives ATSC terrestrial digital transmissions and decodes all ATSC Table 3 video formats
- Display Scanning Format: Has active vertical scanning lines of 480 progressive (480p) or higher
- Aspect Ratio: None Specified
- Audio: Receives and reproduces, and/or outputs Dolby Digital audio
Enhanced Definition Television (EDTV) Monitor:
EDTV Monitor refers to a monitor or display with the following minimum performance attributes:
- Display Scanning Format: Has active vertical scanning lines of 480 progressive (480p) or higher
- Aspect Ratio: None specified
Enhanced Definition Television (EDTV) Tuner:
EDTV Tuner refers to a RF receiver with the following minimum performance attributes:
- Receiver: Receives ATSC terrestrial digital transmissions and decodes all ATSC Table 3 video formats
- Outputs: Outputs the ATSC Table 3 720p and 1080i/p and 480p formats with minimum active vertical scanning lines of 480p. Alternatively, the output can be a digital bitstream output capable of transporting 480p, except the ATSC Table 3 480i format can be output at 480i.
- Audio: Receives and reproduces, and/or outputs Dolby Digital audio
Efficiency Rating
Level of sound output measured at a prescribed distance with a standard input power. Efficiency rating standard is 1 watt (2.83V at 8 ohms) at 1 meter over a specified frequency range and is measured in decibels.
Electronic Crossover
Uses active circuitry to send signals to appropriate drivers. More efficient than passive crossovers. This is also known as an active crossover. (See also
Crossover)
Electrostatic Speaker
One of the oldest speaker design principles, electrostatic speakers are generally comprised of two fixed perforated panels with a constant high-voltage charge applied to them. In between these two panels is an extremely low-mass diaphragm to which the audio signal is applied, causing it to move. There are variations on this construction, but all electrostatic speakers are free from the magnets and voice coils used in conventional speakers.
Equalizer (EQ)
Electronic set of filters used to boost or attenuate certain frequencies.
Equilization
Loosely, any type of relative frequency adjustment. Specifically, the process of changing the frequency balance of an electrical signal to alter the acoustical output.
Euphonic
Pleasing. As a descriptive audio term, usually refers to a coloration or inaccuracy that non-the-less may be sonically pleasing.
Extension
How extended a range of frequencies the device can reproduce accurately. Bass extension refers to how low of a frequency tone the system will reproduce; high-frequency extension refers to how high in frequency the system will play.
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