Parts Express - Tech Terms Glossary

Tech Terms Glossary

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EBP: The efficiency bandwidth product of a speaker driver. Equals the Fs divided by the Qes.

EI (Electronic Iris): Automatically changes a CCD camera¹s shutter to mimic Automatic Iris control, allowing fixed or manual iris lenses to be used in a range of areas that used to require an automatic iris lens.

EIA (Electronic Industry Association): US reference standard for electronic components. Example: an EIA standard for TV is 525 lines, 60 fields per second.

8x (eight times) Oversampling Digital Filter: Prevents the deterioration of phase characteristics by converting the 44.1 kHz sampling frequency into 8 times the base frequency, cutting signals more gently for improved phase characteristics.

Electronic shuttering: Electronic shuttering is the ability of the camera to compensate for moderate light changes in indoor applications without the use of automatic iris lenses.

Elliptical Stylus: A stylus tip having an elliptical cross section, as opposed to a conical shaped stylus.

E-M: The electro-mechanical parameters of a speaker.

Equalization: The process of correcting losses of certain components in a signal.

Equalizer (EQ): Used to adjust or "equalize" various bands of frequencies in an audio system. Bass and Treble are very basic equalizers of two (low and high) frequency-band levels. Equalizers with more frequency bands (7, 10, 15, etc.) simply do the same thing, but break down the frequencies you can hear into smaller groups or bands of frequencies whose levels can be independently controlled.

EP: Standard mounting hole size for Speakon and other audio connectors. Meaures 1-1/4" diameter.

ESP (Electronic Shock Protection): On portable CD players with this feature, digital circuitry creates a buffer that holds several seconds of audio in memory. If the laser skips during playback, this memory buffer can allow audio to continue uninterrupted until the laser regains the correct position. On selected portable CD players, Super ESP circuitry increases the length of the buffer for even greater protection against skipping.

Extension tube: Kit consisting of various size spacers that are used between the lens and the camera to reduce the lens M.O.D. Generally used for very close-up applications. Not recommended for zoom lenses due to loss of tracking.