Brooks Audio Design

An inability of the ear to hear important characteristics of sound under certain conditions. Characteristics that can be affected include pitch, level, clarity, presence and direction. Beats Per Minute BPM The number of steady even pulses in music occurring in one minute and there fore defining the tempo of the song. Brooks Hi Fi speakers Efficiency The acoustic power delivered for a given electrical input. Often expressed as decibels/watt/meter (dB/w/m). ESL �" Abbreviation for electrostatic loudspeaker. Graphic Equalizer An device with several slides controlling the gain of audio signal present which is within one of several evenly spaced frequency bands (spaced according to octaves). Brooks HI FI projectors IC Abbreviation of Integrated Circuit (A miniature circuit of many components that is in small, sealed housing with prongs to connect it into equipment). Jack Bay A series of jacks which have connections for most of the inputs and outputs of t

The extent to which any signal handling process is accomplished without amplitude distortion. Ground Loop A double grounding of a line or electronic device at two different "ground" points of differing voltage. Brooks RM 909 reviews Feedback 1) The delayed signal sent back to the input of a delay line, used in repeat-echo effects. 2) The pickup of the signal out of a channel by its input or the howling sound that this produces. 3) In an amplifier, the phase reversed output signal sent back to its input, reducing gain but also distortion and noise. 4) This occurs when the sound coming out of the speakers goes back into the microphones, then back out the speakers, then back into the mics…and so on. This can build very quickly to a point where everyone in the room is holding their ears and screaming at you. It can also cause damage to the PA. Crossover (Crossover Network) A set of filters that "split" the audio signal into two or more bands (t

The front or body of the guitar. Absorption Short for the term Acoustical Absorption (quality of a surface or substance to take in, not reflect, a sound wave). Brooks Hi Fi reviews Bass 1) The lower range of audio frequencies up to approximately 250 Hz. 2) Short for Bass Guitar. 3) Lower end of the musical scale. In acoustics, the range (below about 200 Hz) in which there are difficulties, principally in the reproduction of sound, due to the large wavelengths involved. 4) The lower frequencies. 5) On the soundboard this should refer to the bass guitar channel, not the bass drum. 6) The lowest frequencies of sound. Bi-Amplification uses an electronic crossover or line-level amplifiers for the high and low frequency loudspeaker drivers. Electromagnetic Field Magnetic energy put out because of current travelling through a conductor. Brooks HI FI projectors Hybrid A product created by the marriage of two different technologies. Meant here as the combinat

Negatively charged particles, which revolve around the centre of atoms. The movement of such electrons down a conductor causes electrical current. Edit A switch that does different things depending on the operational mode that the machine is in: 1) If a computer-controlled transport is in "Stop," pushing the "Edit" switch deactivates the computer-controlled tension system and allows the reels to be moved by hand to find the exact spot desired on the tape. 2) If the machine is in "Play", the "Edit" switch makes the take-up reel cease taking up the tape and it falls to the floor. 3) If the machine is in a fast-wind mode, the tape lifters are defeated so the tape is in contact with the reproduce head and the engineer can hear where the selections begin and end. Brooks Hi Fi speakers Acoustic/Acoustical Having to do with sound that can be heard by the ears. AcousticsThe behaviour of sound and its study. The acoustics of a room d

A unit that will add effects to a direct guitar signal, including a simulated instrument amplifier sound and (often) delay and reverb effects. Clock Signal The signal put out by a circuit that generates steady even pulses or steady codes used for synchronization. Brooks Hi Fi reviews Alternating Current Electric current which flows back and forth in a circuit. Instrument Amplifier A device that has a power amplifier and speaker in a case (or in separate cases) to reproduce the signal put out by an electric instrument (such as an electric guitar) and to allow the instrument to be heard. Brooks RM 909 reviews Expansion The opposite of compression; for example, an expander may allow the signal to increase 2 dB every time the signal input increased by 1 dB. Echo Return An input of the console, which brings back the echo (reverberation) signal from the echo chamber or other echo effects device. Cancellation A shortening of the term Phase Cancellation (t

A wire carrying signals to some place, usually fed from several sources. Kick (Kick Drum) Another term for Bass Drum. Brooks Hi Fi reviews Imaging To make a representation or imitation of the original sonic event. Key The control of a dynamics processing device by an external audio signal. Brooks RM 909 Input Overload Sending too high of a signal level into a device so that the first amplifier of the device overloads. Coincident Microphones (Coincident Pair) Two microphones whose heads are placed as lose as possible to each other so that the path length from any sound source to either microphone is for all practical purposes, the same. Channels These are divided into two separate categories. Input channels are those channels coming into the soundboard such as microphones and direct lines. Output channels are those leaving the board such as monitor and main outputs. LED A light that allows current to flow in one direction only and emits light