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Mobile Electronics Glossary of Terms and Definitions - H

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Mobile Electronics Glossary - H
  Haas Effect - In 1951 Dr. Helmut Haas examined how the perception of speech is affected in the presence of a single, coherent sound reflection. In sound systems, the signal for loudspeakers placed at distant locations from a stage or intended sound stage may be delayed electronically by an amount equal to the time sound takes to travel through the air from the stage to the distant location, plus about 10 to 20 milliseconds. The first arrival of sound from the source on stage determines perceived localization whereas the slightly later sound from delayed loudspeakers simply increases the perceived sound level without negatively affecting localization.
  Harmonic - A weaker overtone or undertone of the original note responsible for the character of the note.
  Head Unit (HU) - The in dash control center of a car audio system. This may be any pre amp or amplified control unit such as an AM/FM/CD player.
  Henry / Henries (Hy) - The measurement for inductance. Coils (low pass filters) are measured in millihenries as in 6.4 mHy (6.4 millihenries).
  Hertz (Hz) - The unit of measurement for frequency. 1 Hz is equal to 1 cycle per second.
  HID - High Intensity Discharge
  High Frequency Driver - A loudspeaker specifically designed to reproduce short, high-frequency wave lengths. The driver typically has a small, lightweight diaphragm. Tweeter.
  High Level Input - An input configured to accept speaker level signals.
  High Pass Filter - A network of elements used to attenuate all frequencies below a predetermined frequency. Frequencies above the cutoff point pass without any effect.
  Highs - Term which refers to a set of speaker components used to reproduce frequencies above 500 Hz as in a set of separates. May also refer to tweeters which are used to reproduce frequencies usually above 2.5 kHz. Not bass.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Mobile Electronics Basics:
Diodes
Glossary of Terms and Definitions
Ohm's Law
Recommended Books & DVD's
Recommended Wire Sizes
Relays
Resistors
Tools and Equipment


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