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Topic: Loudspeaker

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	Loudspeaker Facts - Directivity as a Design Issue
		Where the concept fails is a single loudspeaker, or a small cluster of loudspeakers in a facility where you need to have the same frequency response and sound quality in all the seats both near and far.
		In a loudspeaker system, the directivity is an indication of how directional the loudspeaker is, or to look at it another way, how effective the speaker is at taking the sound it produces and sending it in one particular direction instead of all directions.
		Because the wavelengths of sound have such a wide range of physical size; from 1/2inch (1cm) to 55 feet (18m), it is not possible for a loudspeaker to have the same directivity (or "throw") at all frequencies.
	www.mcsquared.com /speakers1.htm (1622 words)

	Stereo loudspeaker system for a picture reproducing screen - Patent 4410761
		Each loudspeaker unit is co-ordinated to a delay element, and it is also known in the art to co-ordinate an amplifier or an attenuator to each loudspeaker unit so as to control the loudness of each loudspeaker element individually.
		It is advantageous to supply the loudspeaker arrangement of housing 4 with those frequencies which are responsible for the stereo effect, whereas the loudspeaker in the housing 3 is supplied with lower frequencies which are not relevant with respect to the stereo effect.
		The loudspeakers of the housings 11,12 as well as the loudspeaker arrangement of the housing 13 may be either supplied with all frequencies of the audio band or with a limited frequency band only.
	www.freepatentsonline.com /4410761.html (3821 words)

	Loudspeaker Cable Shootout At The Enjoy the Music.com Corral by Karl Lozier
		Some manufacturers feel that since the loudspeaker cables are carrying a much higher voltage they are not as susceptible to the potential deleterious effects of picking up interference effects such as RF and EMF though direct physical effects such as vibration can be significant.
		A safe recommendation to make would be to state that the DH Lab loudspeaker cable is slightly on the bright side of neutral and would best complement a music lover's sound system that is a bit on the dull or possibly the overly sweet or subdued side of neutral.
		The reference or benchmark loudspeaker cable I have used for years now (yes the same brand as in the interconnect review and mentioned often enough in the past) lets every thing come through very clearly and seemingly with no audible edgy distortion, and it is "only" eight times as expensive as the Fantasy.
	www.enjoythemusic.com /magazine/equipment/1003/loudspeakercableshootout.htm (2800 words)

	loudspeaker. The Columbia Encyclopedia, Sixth Edition. 2001-05
		A signal current in the suspended coil, called a voice coil, creates a magnetic field that interacts with the already-existing field, causing the coil and the diaphragm attached to it to vibrate.
		To provide a faithful reproduction of music or speech, a loudspeaker must be able to reproduce a wide range of audio frequencies (i.e., 20 Hz to 20 kHz).
		Since it is difficult for a single speaker to do that adequately, many quality sound systems employ speakers of three different sizes.
	www.bartleby.com /65/lo/loudspea.html (325 words)

	Loudspeaker Summary
		The term loudspeaker is used to refer to both the device itself, and a complete system consisting of one or more loudspeaker drivers (as the individual units are often called) in an enclosure.
		In loudspeaker specifications, one often sees a speaker classified as an "N-way" speaker where N is a positive whole number greater than 1, indicating the number of separate frequency bands into which the system divides the sound (not the number of drivers, as one frequency band may be handled by more than one speaker driver).
		Most loudspeakers have two wires that must be connected to the source of the signal (the audio amplifier or receiver).
	www.bookrags.com /Loudspeaker (7312 words)

	Loudspeakers
		The loudspeakers are almost always the limiting element on the fidelity of a reproduced sound in either home or theater.
		The production of a good high-fidelity loudspeaker requires that the speakers be enclosed because of a number of basic properties of loudspeakers.
		Modern loudspeaker enclosures typically involve multiple loudspeakers with a crossover network to provide a more nearly uniform frequency response across the audio frequency range.
	hyperphysics.phy-astr.gsu.edu /hbase/audio/spk.html (621 words)

	Loudspeaker patent invention
		This invention discloses a loudspeaker 100 that includes a casing 110, a drive assembly 111 with a magnetic core 112, and an induction (voice) coil 113 attached to a first rigid plate 114 for the transmission of vibrations to a support 300.
		The first rigid plate 114 is attached to the casing 110 by a second plate 115 used for the suspension and the radial positioning of the voice coil 113, and elastic studs 116, used for the elastic suspension of the first rigid plate 114 in relation to the casing 110.
		The loudspeaker is characterized by the fact that the suspension means are arranged to provide elastic suspension for the first rigid plate in relation to the casing.
	www.freshpatents.com /Loudspeaker-dt20061116ptan20060256998.php (960 words)

	Suspending a loudspeaker safely Even if your loudspeaker looks secure, take care to make sure the hanging hardware has ...
		Loading the loudspeaker enclosure properly The primary consideration when suspending a loudspeaker enclosure is maximizing the strength of the installation while minimizing the loads applied to the loudspeaker enclosure suspension points and enclosure joinery.
		Loading the loudspeaker hardware properly A loudspeaker sold to be used in an overhead suspension application must be accompanied by an official certification by the loudspeaker manufacturer stating this fact.
		Be aware that the damages caused by a loudspeaker enclosure or loudspeaker cluster falling will be born by the contractor if the necessary and reasonable steps to avoid the accident have not been taken.
	svconline.com /mag/avinstall_suspending_loudspeaker_safely (2653 words)

	PSYOP Loudspeakers
		Loudspeaker teams, once deployed from the perspective stateside reserve units were detached through either the 6th or the 9th PSYOP Battalions to their respective supported ground maneuver units.
		These loudspeaker teams were equipped with broadcasting taped surrender appeals as well as harassment and deception tapes some specially produced by Riyadh's "Propaganda Development Cell".
		One of the most distinctive uses of loudspeakers and taped broadcasts during the Gulf War occurred during a little know deception operation that was carried by a military organization clandestinely known as Task Force Troy.
	www.psywarrior.com /loudspeaker.html (1563 words)

	loudspeaker â“ FREE loudspeaker Information \| Encyclopedia.com: Facts, Pictures, Information!
		It consists essentially of a thin flexible sheet called a diaphragm that is made to vibrate by an electric signal from an amplifier.
		To provide a faithful reproduction of music or speech, a loudspeaker must be able to reproduce a wide range of audio frequencies (i.e., 20 Hz to 20 kHz).
		Loudspeaker employees cheer sale; Workers express relief that the company is not closing its doors
	www.encyclopedia.com /doc/1E1-loudspea.html (1002 words)

	Bi-Wiring From Amplifier To Loudspeaker — Audioholics Home Theater Reviews and News
		Loudspeakers generally employ a “cross-over network” to direct low signal frequencies to the woofer, and high frequencies to the tweeter.
		In the conventional wiring arrangement shown in Figure 1, the HF and LF input terminals are wired together in parallel at the speaker, and just one pair of connecting wires are employed to link both speaker units to the amplifier.
		The second problem for a precise analysis is that the actual details of the loudspeaker crossover, etc, will vary a great deal from one model of loudspeaker to another.
	www.audioholics.com /education/cables/bi-wiring-from-amplifier-to-loudspeaker (837 words)

	Audio Note AN-E/Lexus Versus The AN-J/SPx. Loudspeaker Shootout! by Steven R. Rochlin
		All their loudspeakers are simple, two-way designs whose main difference is internal parts quality and cabinet size.
		All of their loudspeakers are carefully matched within 0.2dB by hand with the aid of a proprietary computer program that received information from a multitude of microphones.
		Both loudspeaker's cabinets are solid and strong, as mentioned earlier they will have a tone when taking the knuckle test.
	www.enjoythemusic.com /magazine/equipment/1203/audionoteloudspeakers.htm (2249 words)

	Motion picture theater loudspeaker system (US4569076)
		A motion picture loudspeaker system is described in which the loudspeaker elements are integral with an acoustical boundary wall such that the characteristics of the vented box woofers are optimized.
		In order to overcome high reflection problems as sound from the tweeters is reflected by the motion picture screen and the acoustical boundary wall, frequency dependent acoustical absorptive material is attached to the wall to inhibit high frequency reflections with minimal effect on the bass optimization.
		loudspeaker means adjacent said acoustical boundary means, said loudspeaker means including at least low frequency and high frequency loudspeaker elements radiating sound energy towards said screen, the screen facing portion of the low frequency loudspeaker element or elements substantially flush with said acoustical boundary means, and
	www.delphion.com /details?pn=US04569076__ (562 words)

	Norh Loudspeaker and high-end audio manufacturer - History
		All of these loudspeakers received glowing reviews and all of these loudspeakers are still popular for the people who bought them.
		This is a marble loudspeaker that uses the "top-of-the-line" drivers from Scanspeak.
		Most loudspeakers are limited in how much volume they can produce because they have to continuously fight with the energy inside the box.
	www.norh.com /about/history/index.html (863 words)

	The AKURATE Loudspeaker System From Linn
		The floor standing Akurate 242 loudspeaker and the compact Akurate 212 loudspeaker incorporate double-ended flared ports whilst the Akurate 225 center channel loudspeaker with twin bass units, operates within a sealed infinite baffle enclosure, as does the floorstanding Akurate 221 bass reinforcement loudspeaker.
		AKURATE loudspeakers are acoustically matched and designed for performance and flexibility for music and theater applications and represent a complementary loudspeaker playback system for the UNIDISK player, the KISTO system controller and other electronic source and control components from Linn.
		Loudspeaker stands are available for $450 each or $900 per pair and the Aktiv cards retails for $325.
	www.avrev.com /news/0903/16.akurate.shtml (594 words)

	Loudspeaker - Search Results - MSN Encarta
		Loudspeaker, device that converts an electrical signal into sound.
		I cannot bear being spoken to all the time by irrelevant loud-speakers...An airport always reminds me of a Butlin's Camp.
		Loudspeakers generally used in home systems come in pairs and resemble boxes.
	encarta.msn.com /Loudspeaker.html (133 words)

	aritcles of hifi stuff
		The loudspeaker will have to be placing at the short length of the rectangular.
		If the loudspeaker have a vented box type with a reflex port at the front, so the loudspeaker must be placing far form the back wall.
		Now for a a vented box that have a reflex port at the back, the loudspeaker have to be placing more far from a previous type of enclosure.
	www.members.tripod.com /nanhifi/positioning.htm (802 words)

	Loudspeaker Drivers - audiotools.com.
		Actually the drivers used by KEF at that time where built for them by ELAC and they have closed the London factory and product line down so searching for them will be a bit pointless, ELAC does however supply spare drivers for their post 1980 products, but not in quantities.
		Makes drivers for both home and car audio loudspeakers and they have what can only be desctibed as a masive range, with anything from units intended for budget hi-fi systems to 12" speakers with power handling close to 500w/8o intended for high end audio applications.
		In the case of loudspeaker cones it adds mass to the cone but stiffens up the material at the same time (in particular if the material is rather soft i.e.
	audiotools.com /drivers.html (2790 words)

	Small satellite loudspeaker system (3)
		After having built a loudspeaker, it is always good to measure the final result to ensure that it meets the design criteria.
		It is the nature of loudspeakers that all the theory in the world doesn't guarantee a good outcome, and that the end result can always be tweaked to make it better.
		The square wave output is also very good, and is characteristic of loudspeaker systems with acoustically aligned drivers and a crossover with good all pass characteristics.
	sound.westhost.com /articles/ssl3.htm (1342 words)

	Linkwitz Lab - Loudspeaker Design
		Loudspeakers with frequency independent, constant directionality such as omni, dipole or cardioid loudspeakers, create delayed replicas of the direct sound in a room and fewer colored reflections.
		Early on, electrostatic panel loudspeakers had intrigued me because they seemed to do something fundamentally right when properly set up and this despite their obvious limitations.
		Read about how loudspeakers should radiate sound uniformly and how they should be placed in the room so that they disappear sonically and the room opens up to the recording venue.
	www.linkwitzlab.com (2025 words)

	Technomad Loudspeaker Wiring
		The connections are on the side so that the loudspeaker can be wired even if one side of the cabinet it is pushed tight up against a wall.
		This is very handy - imagine, for example, that all of the full-range loudspeakers in your rig are wired to only connect to Pair 1 of the SpeakOn connector, and if all of the subwoofers are wired to connect to Pair 2 of the SpeakOn connectors.
		The Chicago subwoofer and the low frequency section of the Cairo biamplified loudspeaker are wired to SpeakOn Pair 2.
	www.technomad.com /products/wiring.html (1290 words)

	Loudspeaker Doppler
		For the purpose of this discussion, the ideal loudspeaker radiates all frequencies within its frequency range with equal efficiency and with zero harmonic distortion and zero intermodulation distortion.
		We must efficiently couple the loudspeaker cone to the air so that when the loudspeaker cone moves, the air mass surrounding the speaker does not have time to move out of the way – it compresses instead – and the compression wave exits the vicinity of the speaker at the speed of sound.
		The loudspeaker is efficiently radiating the high frequency into the air, but the low frequency is just creating a gentle breeze.
	mysite.verizon.net /karl_uppiano/loudspeakerdoppler.html (1639 words)

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