Audio Common Glossary

Absolute Phase
absolute phase
in most microphone, the diaphragm of the positive pressure will be generated when the positive output voltage. If the signal is the correct polarity in the transmission path has not changed, then it ought generate positive voltage at the loudspeaker terminals, which by (most) speakers in the listening position into a positive pressure wave. This is called absolute phase: The source of the original polarity can be obtained in phase by the speaker to clone.

Acoustic Lens

acoustic lens is used in loudspeakers in a mechanical appliance used to enhance the frequency delivery and divergence in order to sound more loyal audible spectrum. This lens is the product of World War II Hou Beier lab studies, promulgated 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 decree to describe the refraction of sound that, when the two voice through the interface among different substances with different speed. High-frequency amplifier in a single point acoustic lens will be collateral to the sound source divergence. Acoustic lens premier company in the 20th centenary by the JBL 50's presentation of advertisement applications, there are two chief designs. The 1st one is inclined record lens, using a catena of carefully calculated hyperbolic shape of the lens plate, which formed the class of feedback mode. This is the most prevalent type of acoustic lens. The second is the integration of porous panel lens, by a team composed of perforated barrier, a barrier fashioned 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 portion because of its fragility, which makes them portable sound reinforcement system for a hazard), but in recent annuals, the technology and re-use In the high-end home audio systems (principally the Bang & Olufsen products).

Alnico
aluminum nickel cobalt alloy / magnet
This is made of aluminum nickel and cobalt compounds are formed. Al plate and cobalt alloy / magnet is a mighty, long-lasting magnetic alloy that contains iron, aluminum, nickel, and one or more other components contain cobalt, copper 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 structure from the speakers to be used; it than the average ferrite (steel) magnets have a better energy percentage. Electric guitar manufacturers are also popular Alnico alloy magnets, use it for pickup, because of its ruggedness and traits can be assigned. Alnico II and Alnico V are two different specifications of the magnet used.

Baffle
barriers
in the music industry, the rumpus barriers is to prevent interference between sound isolation devices. Insulation embark used in the speaker closet. Speakers on the installation of the insulation board surface, the use of noise barriers from the initial purpose is to prevent the interference of sound out of the rear speakers to the front speakers out from the sound waves. Do not use noise barriers,Womens Gucci Flats, sound waves mediate with each other and mitigation, especially in the low frequencies. Insulation board in order to achieve low-frequency noise when the function, 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 achieve noise on the speaker closet, which among the speaker and to prevent a lot of interference. Modern speaker cabinet design, noise barriers in the way of basic and additional a variety of small capabilities 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 customary dispersion, the high frequency signal to start directly emitted from the device, preferably than scatter to the sound space. 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 horn) in diameter, it will happen, unless special measures taken to decrease or discourage the beam emission. This means that in the low frequency 18 To some amplitude, speakers can solve this problem, but also occurs at a higher frequency of this phenomenon. 70s in the 20th century, was developed by directional speakers, a massive number for the improvement of this phenomenon, although there are also some answers.

Combo Amp
fusion of amplifier
This is in appending to some types of amplifiers, such as solid-state amplifiers and tube amplifiers, but for different tectonic guitar amplifier. Combination of the amplifier is an independent parts, in a box contains the amplifiers and speakers, diverse the other lonely in a box in the amplifier.

Damping
damping / lessen
in physics, and the reduction of this amplitude is narrated to if 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 telling. 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 mainly disable 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 achieve Doppler effect, is named after the German physicist (Why do they all have so numerous labeled after the German physicist word?), while the source move relative to the listener, the sound of the treble will be changed significantly. For instance, when the motorcar near to us, sounds its trumpet in the high treble, very harsh, when it is through us, not so high treble sounds,Gucci Trainers, horn was not so raspy. This principle applied to rotating Leslie speaker system to produce sound. Speakers relative to the fast-moving audience to produce a tremolo efficacy. 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 certain percent will be conical with the low-frequency signals up and down campaign of alteration. In truth, this is a high frequency signal after the frequency adjustment of the low frequency signal, known as the This makes the sound

Efficiency

is used to measure the efficiency of the digit of input stamina into the speaker's voice. The remaining stamina is converted into heat. Most of the speakers instantly to the efficiency of cooling is 1% or 2%; horn-style speaker load close to 20% efficiency, and some can be as high as 30%. High efficiency manner a lower kinetic vigor of the amplifier can achieve the same standards, but also absence to have low efficiency speakers, the low efficiency of the speaker's sound quality is more accurate because there is a better damping / reverberate decrement and fewer influence by .

Excursion
offset
in the audio field, the offset and the speaker shook ashore. Offset refers to the speaker relating to its native location before and afterward (inside and outdoor) the distance voyaged. To encounter the assorted measures of offset the different types of speaker chart. Typically, the low-frequency driver, or ultra cheap frequency microphone designed high-frequency driver design of the speaker than the more shift. Reduction of extra loudspeakers offset poor, sounding very loose,Mens Gucci Boots, so designers have to find a appropriate path apt design, the choice of speakers also disburse care to the carton and its petition. If you pedal the speaker further its limits, you may hear This namely cried over-migration or

Ferro Fluid
Ferro catching fluid (cooling)
is a ferro magnetic liquid, which means it will be the role 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 force, the harder it becomes. Magnetic fluid typically used in speakers (especially tweeters), for voice reel and magnet between the heat exhaustion. Magnetic fluid placed on the speaker's voice coil and magnet middle of the magnetic gap. Magnetic fluid magnetic magnetic field allows auto positioning, and will not move around, it is more salutary than atmosphere cooling coil. 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 gate voltage as a different and all but according to the signal to attract the electron emitted from the cathode, making them pass through metal plates. Can imagine the tap gate, the input signal is This is the basic principle of the amplifier: the output from the power supply to a large number of voltage of the device and use the signals to control the number and reach a large number of voltage through the next device (such as speakers). Triode vacuum tube, and its name is because there are 3 electrodes, which used the gate to the on 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 plate capacitance. This capacitance can reason undue 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 joined to suppress the gate called the gate on the 3rd or the electrode. A lot of impact deserving 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 assured return to the gate voltage on the curtain. Electronic steering plate to amplify the overall efficiency of the vacuum tube.

Half Space
half
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 design of the speaker cabinet .) When a sound source placed across a solid barrier, such as a walls, the same barrier of energy will be reflected back to space here, or This will increase at half the sound energy generated in the effect of doubling the volume each 3dB increase. In the low frequency of this phenomenon is more noticeable when the sound signal. Stereo speakers placed on a wall opposite the field in the audition, you will usually find the bass even heavier. Treble is not as premonitory results, because the treble is more clear way, and the tweeter speaker placed in front of the cabinet, is one half of its operating environment. The other side of the low frequency signal can pass through the restricted box speaker, but when they meet the wall (or even the kind of standard home wall), when more energy is reflected back to the room. Many speakers in the production of the plant was a good pre-prepared in order to produce this phenomenon.

Impedance

impedance weighed in ohms impedance, is the perimeter or equipment interlocked AC resistance. The AC circumference can be whichever 2 audio devices attach, such as a speaker and one amplifier linkage, displacement of audio whistles. Low impedance of the speaker than the tall impedance of the speaker to have a greater beginning power (Watts), entire other devices are favor this. In mandate to generate the same power, it makes the amplifier more pressure. If the impedance is also low, the amplifier can not deal, and wrong entities ambition happen. Most modern electronic audio equipment have a lofty input impedance so that power output can be driven lower. This is now very low spend lofty quality audio equipment, 1 of the causes.

Limiter
limiter
limiter is a dynamics processor, similar to the compressor. In fact, many compressor gathering suitable as a limiter, then you can use. The main feud is used to reduce the rate of gain. In the limiter, this ratio is set too close to infinity as possible: 1 (not matter how the input signal changes, the output level is kept constant). The fancy is to set up a maximum acquire limiter volume, and to prevent the signal becomes louder than the set amount. And as compressor, limiter is used for various intentions. 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, conservation of the speaker and amplifier to avoid shocks and so on. Any time you absence 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 movie technology in a lot of meaning. As a verb, monitoring means monitoring the source, such as audio tracks or mixer. In the recording environment, the monitor speakers melodrama behind the scene is to use sound signals, and its disc in the pathway. Music listeners can also refer folk to use the special genius mix (monitor mix), usually the melody played through headphones as reference and processing. This is periodically referred to as remind mixing. Enhance the sound, the listener is the speaker system and / or headset system for tuning the audio program and migrate to the normal performers. Used in calculators, CRT monitor is LCD smooth cathode ray tube or fluid crystal exhibit, or performance program for the visual display picture.

Neodymium
Nd
the periodic table of elements atomic number 60 (symbol Nd), neodymium is a infrequent element of silver, mostly for the manufacture of colored cup. But sometimes also used to make magnets. Neodymium magnet material than the other more mighty, and accordingly effortless 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,Gucci Shoes UK, 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 elect from all directions is called comprehensive. If the speaker can transfer sound in all directions, also known as comprehensive; which tend to refer to drivers with deep bass and low frequency speaker. Typically,Womens Gucci Casual Trainers, the low and high frequency likened 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 stress, the other end of the unlock of charge. When voltage is applied to this material, vibration can also occur. Quartz is known one of a piezoelectric material, usually made into small chips 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 stable frequency vibration. This makes the crystal into a digital audio creation equipment components (such as see or timer) is the ideal material. Piezoelectric units can also be used for a diversity of drive, such as the phonograph cartridge, 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 normal scope 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 between wizardry, generating additional speakers appear The fantasy, or (more importantly) to increase the reality of the acoustic space. For example, in the easy installation of a left / right speaker system, the middle, whether the system is well designed and well the audio signal transmission, it could produce causativeable phantom 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 corner of the room, it is called in the 1 / 4 field. This half of the speaker than the noise level increases 3dB (especially the bass frequencies) than the speakers in the open environment to increase 6dB. For more information on this phenomenon see WFTD's

Re-Amp
results have been pre-playback
entrance through the amplifier (and possibly speakers) playback devices like the effect has been pre-entry process. With the popularity and flexibility of DAW systems increases, it has transform 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 management. 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 another 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 ultimate completion. 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 win a special sound.

Slope
slope / span
in the audio filter, the tilt / span refers to the once through the filter cutoff frequency, the filter will be reduced to how quickly the frequency. Span is the number of dB / octave measurement. For example, a high-pass filter cutoff frequency is 4000Hz, span a 6dB / octave higher than 4000Hz per octave (frequency doubling) 6dB decreasing frequency. Span of the filter's The first direction 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, modulation correct span is very essential. For example, this determines how accurately slit equalizer or enhance some frequencies without affecting others. For the divider, the span is also very momentous, can not surpass the frequency cut-off frequency of transmission to the amplifier and the driver (the typical span of the filter frequency is 12-24dB / octave range). Sometimes, the partakers of the filter frequency characteristics in order to choose the span to achieve a specific response to the speaker settings.

Surround Sound

surround sound is multi-channel surround sound audio playback mode, including at fewest three speakers (left, medium and right), but more generally, 5 or more more. Motion Picture pictures first public display of multi-channel sound from Disney Fantasia published in 1941, but until the early 20th century, 50, with the four-track stereo broad screen CinemaScope and Todd-AO film system Tod six wide-screen Track mode emergence of multi-channel prototype was successfully used in business. With the surround sound technology for the movie manufacture have the greatest impact, clients applied only to watch the fast development of commercial success. Today, the surround sound playback system typically includes five speakers and a subwoofer, 5.1 surround sound system formed, just like theater sound system. 5.1 The system uses a front left, front right and center channel, two surround channels (usually located in the rear of the audience or the audience's left and right), and a subwoofer aisle. Dolby Digital Surround encoding technology was first in the 1995 Laser Disks to see,Womens Gucci Pumps, in recent years after the DVD revolution with global application. Today, DVD video, DVD surround sound audio and assorted other modes (including cable and VHS home video systems) into the average consumer's home.

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 assist measure, or to help resolve the most suitable placement of the speakers , measuring sound pressure level, and adjusting the gain of the audio system. In methodology, the test tone is nailed by the lusted tone of pure waveform. But in train, many of the test tone is perfect wag 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

remove sound quality that occasionally appear in the clear for the audio enthusiast certainly leave a deep impression. Clear is that the legibility 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 decode 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 decode the digital bit flow, and use . This two-channel signal will bring an end to ... a two-channel sound card, and after an outer or built-in Dolby Surround Pro Logic decoder processing, to provide four-channel sound - left, center, right front and surround sound. If you choose, 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 many 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 false reverb devices. Xophonic reverb is basically the size of a bookshelf speaker, contains a small speaker and an around 50-foot pipe, pipe the other end of a loudspeaker. This can produce approximately 50 milliseconds of tarry, and reverb mix of internal and the original signal, and then through a detach amplifier and speakers sent to the apartment. Xophonic reverb is the first home designed signal processor. It quickly became renowned, until the stereo sound reproduction system, before we perish.

Zip Cable
hub zipper
term accustom to refer to the low specifications, expensive speaker cables. This type of cord is often referred to as Such low-power cables and wires similar to the ordinary.