Audio Common Glossary

Absolute Phase
absolute phase
in maximum loudspeaker, the diaphragm of the affirmative pressure ambition be generated while the positive output voltage. If the marking is the correct polarity in the transmission route has no changed, then it ought produce positive voltage at the loudspeaker terminals, which at (most) speakers in the hearing position into a positive oppression wave. This is called total phase: The source of the original polarity tin be won in phase by the speaker to reproduce.

Acoustic Lens

acoustic lens is used in loudspeakers in a mechanical device used to improve the frequency distribution and divergence in order to sound more persistent aloud spectrum. This lens is the production of World War II Hou Beier laboratory studies, published in 1949. The aim is to converge light waves of light the lens to converge sound waves in the same way. There is an axiom known as Snell's statute to depict the refraction of sound that, when the two voice through the interface between different materials with different speed. High-frequency amplifier in a single point acoustic lens will be parallel to the sound source divergence. Acoustic lens first corporation in the 20th century by the JBL 50's presentation of commercial applications, there are two chief designs. The first one is inclined disc lens, using a array of cautiously calculated hyperbolic shape of the lens plate, which formed the level of response mode. This is the most prevalent type of acoustic lens. The second is the integration of porous plate lens, by a group composed of perforated barrier, a barrier formed at the alarm. The prologue of the barrier will really have the size of the center of the termination in a different response. Although the acoustic lens in the 20th century, 70's and 80's increasingly unpopular (in part because of its fragility, which makes them portable sound reinforcement system for a risk), but in recent years, the technology and re-use In the high-end home audio systems (especially the Bang & Olufsen products).

Alnico
aluminum plate cobalt alloy / magnet
This is made of aluminum nickel and cobalt compounds are formed. Al nickel and cobalt alloy / magnet is a mighty, long-lasting magnetic alloy that contains iron, aluminum, nickel, and one or more other components include cobalt, bronze and titanium. 40 years since the 20th century, when a special high-energy R & D came out of Alnico V, aluminum nickel-cobalt alloy / magnet framework from the speakers to be used; it than the average ferrite (iron) magnets have a better energy ratio. Electric guitar manufacturers are also popular Alnico alloy magnets, use it for pickup, because of its ruggedness and functions can be assigned. Alnico II and Alnico V are two different descriptions of the magnet used.

Baffle
barriers
in the music industry, the noise barriers is to prevent interference between sound solitude devices. Insulation embark used in the speaker cabinet. Speakers on the installation of the insulation board surface, the use of ruckus barriers from the initial intention is to discourage the interference of sound out of the rear speakers to the front speakers out from the sound waves. Do not use noise barriers, sound waves mediate with each other and mitigation, especially in the low frequencies. Insulation board in order to effect low-frequency noise when the feature, you must use a big, big noise barriers in order to prevent longer-wavelength sound waves and other acoustic common interference and mitigation. Used to accomplish noise on the speaker cabinet, which among the speaker and to prevent a lot of interference. Modern speaker cabinet design, noise barriers in the way of basic and joined a variety of small skills and designed to improve sound. The basic design, including bass reflex, sound left hanging and so on.

Beaming
launch
This is the microphone beam (including speakers and tweeters) a phenomenon, when the device reduced the normal dispersion, the high frequency signal to start directly emitted from the device, prefer than scatter to the sound district. When the audience when standing directly in front of speakers, it sounds like a device produced only high-frequency signals. When the device is smaller than the wavelength of the sound signal (or trumpet) in diameter, it will occur, unless special measures taken to reduce or prevent the beam emission. This means that in the low frequency 18 To some extent, speakers can solve this problem, but also occurs at a higher frequency of this phenomenon. 70s in the 20th century, was adult by directional speakers, a large number for the improvement of this phenomenon, although there are also some answers.

Combo Amp
alignment of amplifier
This is in adding to some types of amplifiers, such as solid-state amplifiers and tube amplifiers, yet as different tectonic guitar amplifier. Combination of the amplifier is an independent portions, in a box contains the amplifiers and speakers, unlike the additional unattended in a box in the amplifier.

Damping
damping / reduce
in physics, and the cutback of this amplitude is narrated to whether or mechanical power. In the acoustic equipment, mechanical means, for weakening or reducing the piano, guitar, bass and other strings vibration. Drums and other equipment used for silencing is efficacious. In acoustics, which can mean less vibration or acoustic reflectivity. For example, applied to shock absorbers in the sound, installed in the wall surface or speaker cabinets, we can effectively weaken or reduce sound reflection.

Dispersion
dispersion / distribution
sound sound speakers effective scope angle. View the speaker's manual to see which is divided into two parts: the curtate angle and perpendicular angle (such as 90 degrees x60 degrees).

Doppler

Doppler effect Doppler effect, is named after the German physicist (Why do they all have so many named after the German physicist word?), when the source move relative to the listener, the sound of the treble will be changed significantly. For example, when the car close to us, sounds its horn in the high treble, very coarse, when it is through us, not so high treble sounds, horn was not so coarse. This principle applied to rotating Leslie speaker system to produce sound. Speakers relative to the fast-moving audience to produce a tremolo effect. There are many modern effects, Leslie audio components are simulated, and the Doppler effect. If an amplifier has low frequency and high frequency signals, low frequency signal will be to move the cone to the audience (of course, such high-frequency signals, but the low frequency is more manifest.) When this happens, the audience heard a high pitch frequency sound signals to a definite percent will be conical with the low-frequency signals up and down movement of change. In fact, this is a high frequency signal after the frequency correction of the low frequency signal, known as the This makes the sound

Efficiency

is used to measure the efficiency of the number of input energy into the speaker's voice. The remaining energy is converted into heat. Most of the speakers directly to the efficiency of cooling is 1% or 2%; horn-style speaker load near to 20% efficiency, and some can be as high as 30%. High efficiency means a lower kinetic energy of the amplifier can achieve the same standards, but also need to have low efficiency speakers, the low efficiency of the speaker's sound quality is more precise because there is a better damping / echo reduction and less affect by .

Excursion
offset
in the audio field, the offset and the speaker migrated on. Offset refers apt the speaker relating to its aboriginal location before and later (inside and appearance) the distance traveled. To encounter the assorted values of offset the another types of speaker devise. Typically, the low-frequency driver, alternatively ultra cheap frequency loudspeaker designed high-frequency driver design of the speaker than the more shift. Reduction of extra loudspeakers offset needy, sounding very loose, so designers must ascertain a suitable course apt chart, the choice of speakers likewise disburse care to the box and its applying. If you pedal the speaker beyond its limits, you may listen This namely shrieked over-migration or

Ferro Fluid
Ferro fascinating fluid (cooling)
is a ferro magnetic liquid, which means it will be the character of magnetic field. Magnetic field effects in addition to, ferro magnetic fluid concentration and the fuel is similar to a colloidal solution, but by the strength of the magnetic coerce, the harder it becomes. Magnetic fluid typically used in speakers (especially tweeters), for voice roll and magnet between the heat exhaustion. Magnetic fluid placed on the speaker's voice reel and magnet middle of the magnetic gap. Magnetic fluid magnetic magnetic field allows automatic positioning, and will not move nigh, it is more salutary than ventilation cooling reel. This would have more power input to the voice coil and not converted into heat.

Grid
plate grid / gate
is a lot of vacuum tube components of electrodes (not for diodes). Gate as a control in the tube in the gate. Input signal is applied to the gate and the door voltage as a different and hardly ever along to the signal to fascinate the electron emitted from the cathode, production them pass through metal plates. Can assume the pat gate, the input signal is This is the basic rule of the amplifier: the output from the power supply to a massive number of voltage of the device and use the signals to control the number and reach a colossal number of voltage through the afterward device (such as speakers). Triode vacuum tube, and its appoint is because there are three electrodes, which used the gate to the above functions. Tetrode gate there are two, one and the same transistor in the gate function (called the control gate or gate 1) and another (called shutter gate or gate 2) is used to reduce the control between grid and panel capacitance. This capacitance can reason extravagant tube in the input circuit and output circuit connection, making the amplifier unstable. Positive gate voltage applied to the shutter will be in the control gate and a metal plate between the electrostatic safeguard. Pentode additional to taboo the gate called the gate on the 3rd or the electrode. A lot of impact due to other electronic metal plates are metal plates to prevent the prohibition of grid reflected back (known as secondary radiation) of the electronics, put a positive return to the gate voltage on the shutter. Electronic steering panel to increase the overall efficiency of the vacuum tube.

Half Space
half
when a speaker or other audio appliance placed in an open space,Gucci Shoes, the sound will be transmitted in always directions (of lesson, depending on the design of the speaker cabinet .) When a sound source placed across a solid barrier, such as a walls, the same barrier of stamina will be reflected back to space here, or This will addition at half the sound energy generated in the efficacy of doubling the volume every 3dB mushroom. In the low frequency of this phenomenon is more noticeable when the sound signal. Stereo speakers placed on a walls opposite the field in the hearing, you will usually find the bass even heavier. Treble is not as significant results, for the triple is more clear instruction, and the tweeter speaker placed in front of the cupboard, is one half of its operating environment. The other side of the low frequency signal can pass through the narrow box speaker, but when they encounter the walls (or even the kind of criterion home wall), when more energy is reflected back to the chamber. Many speakers in the making of the factory was a nice pre-prepared in mandate to generate this phenomenon.

Impedance

impedance weighed in ohms impedance, is the circumference or equipment joined AC resistance. The AC circuit can be any two audio devices together, such as a speaker and an amplifier linkage, transmission of audio signals. Low impedance of the speaker than the lofty impedance of the speaker to have a greater starting power (Watts), all other devices are like this. In order to produce the same power, it makes the amplifier more pressure. If the impedance is also low, the amplifier can not deal, and bad things will happen. Most modern electronic audio equipment have a lofty input impedance so namely power output can be driven lower. This is now very low price high quality audio equipment,Cheap Gucci Shoes, one of the reasons.

Limiter
limiter
limiter is a dynamics processor, similar to the compressor. In fact,Womens Gucci Sandals, many compressor assembly suitable as a limiter, then you can use. The main difference is used to reduce the rate of gain. In the limiter, this ratio is set too close to infinity as possible: 1 (no stuff how the input signal changes, the output level is kept constant). The motif is to set up a highest gain limiter volume, and to prevent the signal becomes louder than the set amount. And as compressor, limiter is used for various purposes. There are some: when using digital recorders in the meantime when the maximum signal level to prevent distortion of the signal necklace to prevent overload, when the consumer set a maximum volume when the headset monitor the level of protection, protection of the speaker and amplifier to lest shocks and so on. Any time you ambition to set the maximum gain limit and prevent the signal through the limiter is a tool for you to select!

Monitor
control / monitoring
the term applied to audio and video technology in a lot of averaging. As a verb, monitoring means monitoring the source, such as audio tracks or mixer. In the recording context, the monitor speakers play back the scene is to use sound signals, and its disc in the track. Music listeners can also refer people to use the special genius merge (monitor mix), usually the music played through headphones for reference and processing. This is sometimes referred to as remind mixing. Enhance the sound, the listener is the speaker system and / or headset system for tuning the audio procedure and migrate to the normal performers. Used in computers, CRT monitor is LCD flat cathode ray tube or liquid crystal display, or rendition program for the visual display image.

Neodymium
Nd
the periodic chart of elements atomic number 60 (symbol Nd), neodymium is a rare element of silver, mostly for the industry of colored glass. But sometimes also used to make magnets. Neodymium magnet material than the other more powerful, and accordingly easy for the audio industry, as manufacturers can use it to produce more powerful microphone and / or the speaker driver. For example, the use of neodymium magnets microphone, neodymium magnets and other components do not use the microphone than to have 6dB (or more) output.

Omnidirectional
comprehensive
the name suggests, is that all directions. In the audio industry, if the microphone to pick from all directions is called comprehensive. If the speaker can transmit sound in all directions, also known as comprehensive; which tend to refer to drivers with deep bass and low frequency speaker. Typically, the low and high frequency compared to low frequency is prejudiced in favor of comprehensive, high frequency is a more certain direction.

Piezo

piezoelectric piezoelectric piezoelectric effect or short. Piezoelectric material occurs when the end of the subject in some squeeze or mechanical accentuate, the other end of the unlock of charge. When voltage is applied to this material, vibration can also happen. Quartz is known one of a piezoelectric material, usually made into small pieces of material, known as crystal, used in frequency standards. A specific size and shape of the crystal in the applied voltage, is a predictable and settled frequency vibration. This makes the crystal into a digital audio production equipment components (such as watch or timer) is the ideal material. Piezoelectric elements can also be used for a variety of drive, such as the phonograph ammunition, microphone and speakers. Piezoelectric microphones are small, with higher output, and low cost; Nevertheless, its frequency response is not satisfactory, so demanding, then the microphone is not available. Piezoelectric microphone is usually in the form of loudspeakers, or high frequency components. 5kHz and above customary range in less distortion, but not widely used in sound reinforcement systems, in part because its output is lower. Need to play dozens of common and piezo tweeter to achieve a medium-sized compressed drive the same output.

Phantom Image
fantasy funny like
multi-channel audio playback in the system, any two (or more) loudspeakers as crosstalk among wizardry, generating appended speakers emerge The fantasy,Gucci Shoes Sale, or (more importantly) to increase the reality of the acoustic space. For instance, in the uncomplicated installation of a left / right speaker system, the middle, if the system is well designed and well the audio signal transmission, it could produce causativeable fantasy center sound image.

Quarter Space
15 min of the field
when a speaker or other audio device placed in an open space, the sound will be transmitted in all directions (of course, depending on the speaker box body design). When a sound source placed across a solid barrier, such as a wall, the same barrier of energy will be reflected back to space here, or When a speaker placed in the fastening sites of two walls, such as the edge of the room, it is called in the 1 / 4 field. This half of the speaker than the noise class increases 3dB (especially the bass frequencies) than the speakers in the open environment to increase 6dB. For more message on this phenomenon see WFTD's

Re-Amp
results have been pre-playback
entrance through the amplifier (and maybe speakers) playback devices like the effect has been pre-entry process. With the popularity and flexibility of DAW systems increases, it has convert a popular guitar recording techniques. A sound engineer may input guitar signal dry tone, or even directly from the acoustic guitar, and not through any amplifiers, preamps, or effects, after, or by other pre-amp guitar amplifier or processor for the original soundtrack manipulation. The output of the DAW or dry acoustic guitar sound (or other tracks) sent to the amplifier, and then transfer them from the amplifier, speakers often use the microphone on the recording, then record the other channel in the DAW, to complete this process. Sometimes, this process can also be built by DAW plug-ins to achieve. Ultimately made sound may no longer be transcribed to dissimilar track, or just as a field device for mixing. This makes it the most amenable talents or engineers may use this sound, as a tread in the process. Usually the guitar sound until the mixdown (mixdown) treatment before the final achievement. Although this technique is mostly used for guitar recording, but can also be used for bass, keyboard, recording, and sometimes even drums for the vocal recording or recording in order to obtain a special sound.

Slope
slope / span
in the audio filter, the incline / span refers to the once through the filter cutoff frequency, the filter will be reduced to how rapid the frequency. Span is the number of dB / octave measurement. For example, a high-pass filter cutoff frequency is 4000Hz,Cheap Gucci Trainers, span a 6dB / octave higher than 4000Hz per octave (frequency doubling) 6dB decreasing frequency. Span of the filter's The first instruction or pole filter has a span of 6dB / octave. The second direction, or polarized filters in the span of 12dB / octave, and so on (or very span of each direction per 6dB / octave increments.) In the filter design,Womens Gucci Pumps, modulation correct span is very essential. For example, this determines how accurately mow equalizer or enhance some frequencies without affecting others. For the divider, the span is also very important, can not exceed the frequency cut-off frequency of transmission to the amplifier and the driver (the typical span of the filter frequency is 12-24dB / octave scope). Sometimes, the partakers of the filter frequency specifics in order to choose the span to achieve a specific feedback to the speaker settings.

Surround Sound

surround sound is multi-channel circle sound audio playback mode, including at least 3 speakers (left, navel and right), but more generally, five or more more. Motion Picture pictures 1st public display of multi-channel sound from Disney Fantasia promulgated in 1941, but until the early 20th centenary, 50, with the four-track stereo wide screen CinemaScope and Todd-AO movie system Tod six wide-screen Track mode emergence of multi-channel prototype was successfully used in affair. With the circle sound technology for the film industry have the greatest shock, clients applied only to penetrate the rapid development of advertisement success. Today, the surround sound playback system typically includes 5 speakers and a subwoofer, 5.1 surround sound system formed, fair like cinema sound system. 5.1 The system uses a front left, front right and hub aisle, two surround channels (normally situated in the rear of the audience or the audience's left and right), and a subwoofer channel. Dolby Digital Surround encoding technology was first in the 1995 Laser Disks to discern, in recent years after the DVD revolution with prevalent application. Today, DVD video, DVD surround sound audio and manifold other modes (embodying wire and VHS home video systems) into the mean consumer's family.

Test Tone
test tone
for testing purposes of a pre-determined level and frequency of the tones sent by a particular waveform, such as to help measure, or to help make sure the most fitting placement of the speakers , measuring sound pressure level, and accommodating the gain of the audio system. In theory, the test tone is nailed by the desired tone of pure waveform. But in train, many of the test tone is absolute wave formation, the quality of the test tone is generally relatively high quality directly from the device (usually some type of oscillator) wave generated by the resulting tone.

Transondent

clear sound quality that sometimes emerge in the clear for the audio enthusiast naturally quit a deep impression. Clear is that the perspicuity of the sound passing, is similar to the transparency of light. Popular speaker mesh percolate and the two in order to have better performance and need clear modulation components.

Virtual Dolby Digital

Virtual Dolby Digital, Dolby Laboratories has computers, computer games and video game developed three types of virtual surround sound processing. When the implementation of Virtual Dolby Digital technology is based on computer models to the implementation of Dolby Digital. In this way, the first of a Dolby Digital decoder to decipher the digital morsel stream and generates a 5.1 channel signal. Then generate a Therefore, only the signal of the channel provided by the two speakers. When a single audience in the middle of the left and right speakers, this system presents the best. Virtual Dolby Digital technology in the application, some computer through a Dolby Digital decoder to decipher the digital morsel stream, and use . This two-channel signal will all over a two-channel sound card, and after an external or built-in Dolby Surround Pro Logic decoder processing, to provide four-channel sound - left, center, right front and surround sound. If you prefer, you can center channel modulation as a

Woofer

subwoofer speaker system using multi-drive low-frequency speakers. Sometimes called for very low frequency bass. Subwoofer speaker is usually a large (12 offset (the distance between the speaker inside and outside the movement.) In numerous speaker systems, multiple drives to be used in the subwoofer is used to generate one of the lowest frequency components.

Xophonic
Xophonic reverb
20 century, 50 years, craftsmen for home use by the radio manufacturer's pretended reverb devices. Xophonic reverb is basically the size of a bookshelf speaker, contains a small speaker and an approximately 50-foot pipe, pipe the other end of a microphone. This can produce about 50 milliseconds of tarry, and reverb mix of interior and the original signal, and then through a detach amplifier and speakers sent to the room. Xophonic reverb is the first home designed signal processor. It rapidly became renowned, until the stereo sound reproduction system, before we fade.

Zip Cable
hub zipper
term used to refer to the low specifications, priceless speaker cables. This type of cable is often referred to as Such low-power cables and wires similar to the mediocre.