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Topic: Loudspeaker acoustics

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	Acoustics Research & Loudspeaker Development
		The roll of the acoustic engineer is to verify and evaluate potential solutions and often, as in the case with Bang and Olufsen, develope new technologies and ideas in order to solve a particular problem, such as very limited space.
		The loudspeaker is a 2 or 3-way active loudspeaker with an acoustic lens and provides unrivalled imaging and sound performance.
		It is an active 2-way loudspeaker with 2 x 250W of power driving a 5" woofer in a closed aluminium cabinet and 3/4" tweeter in an acoustic lens.
	www.mountain-environment.com /acoustics.html (1766 words)

	Church acoustics,church sound problems - speech intelligibility,reverberation time control, RT60,echo reduction,noise ...
		Acoustics is not about the 1/10th of 1% of the sound from the loudspeaker that is directly heard by the people.
		Acoustics is about the other 99-9/10ths % of the sound, intercepting it and turning it into a sound that is fit to be heard.
		It is the echoes and reverberation of sound due to the acoustics of the hall.
	www.church-acoustics.com /aa103.htm (2541 words)

	North Manifest Loudspeaker System
		Loudspeaker designers have debated for decades what is the most critical aspect of loudspeaker design; cabinet design, bass alignment, crossover slopes, phase linearity, etc. All of these elements are important to the success of the finished design, and all contribute to the most critical aspect: Voicing.
		Voicing is the process of precisely balancing a loudspeaker's deep bass weight, low end punch, lower midrange robustness, midrange liquidity, upper midrange openness, and top end sparkle to create a system that is homogeneous in character from top to bottom and reproduces all forms of music and voice with the correct harmonic content.
		The resulting acoustic response is flat from the low frequency measurement limit to 1060 Hz, 6dB down at 1.3kHz, and continues to roll of smoothly at 18dB/ocatve as frequency increases.
	www.northcreekmusic.com /Manifest/ManifestInfo.htm (3172 words)

	Read about Loudspeaker acoustics at WorldVillage Encyclopedia. Research Loudspeaker acoustics and learn about ... (Site not responding. Last check: 2007-10-17)
		Loudspeaker Acoustics is the study (either scientific or pseudo-scientific) of the behaviour of the
		loudspeaker and in particular the effort to create loudspeakers with good sound quality (either subjectively or objectively measured).
		These include anechoic or simulated-anechoic measurements, resonance and standing-wave measurements etc. They have become significantly easier and more precise with the advent of computers, which allow detailed measurements of various aspects of loudspeaker behavior withiut the need to resort to (expensive) anechoic rooms.
	encyclopedia.worldvillage.com /s/b/Loudspeaker_acoustics (150 words)

	Gershman Acoustics Cameleon loudspeaker by Neil Walker
		You cannot allow the manufacturer's charming story make you hear a loudspeaker sound better than it is. And thus, it comes to this: these are very good loudspeakers.
		The woofer is ported at the bottom of the loudspeaker cabinet at floor level.
		Even with the cone, the loudspeaker is a little unstable on broadloom and could easily be upset by a child running into it, parental warnings notwithstanding.
	www.enjoythemusic.com /magazine/equipment/0702/gershman.htm (2033 words)

	Room Acoustics
		Practical loudspeakers are neither pure monopoles nor pure dipoles except at low frequencies where the acoustic wavelengths are large compared to the cabinet dimensions.
		Because of the progressive acoustic short circuit between front and rear as the reproduced signal frequency decreases, the membrane of an open-baffle speaker has to move more air locally than the driver cone of a box speaker for the same SPL at the listening position.
		I have come to the conclusion that real rooms are acoustically far too complex to predict the transmission of sound from speaker to listener, where the sound paths are in three dimensions, have direction and frequency dependent attenuation and diffusion, and can excite the inherent resonance modes of a room to unknown degrees.
	www.linkwitzlab.com /rooms.htm (5245 words)

	North Acoustics Near Wall Specific Loudspeakers (Site not responding. Last check: 2007-10-17)
		Most conventional "bookshelf"-type loudspeakers are actually designed to be placed on a stand in the acoustic free-field; that is, with the rear of the loudspeaker a minimum of two feet from the back wall and its face three to four feet out.
		The central design element of North Acoustics' Near Wall Specific™ loudspeaker systems is based on a fresh new look at the performance vs. placement issue: by fixing one boundary condition and optimizing the loudspeaker’s performance for that boundary condition, the owner then has considerable placement freedom as long as the first boundary condition is kept.
		The.A.R.T. Metro loudspeaker defines a technological leap in ribbon loudspeaker design: it is the first ribbon loudspeaker in history that combines the incredible dynamics of an enormously powerful motor moving a nearly massless diaphragm with wide, even dispersion pattern in both the horizontal and vertical domains.
	www.northacoustics.com (1870 words)

	Black Dahlia Acoustics - Loudspeaker Kit Plans
		The BassZilla is an ultra high-efficiency (95 — 98 dB 1W/1m) loudspeaker family designed by Dick Olsher to facilitate the ultimate listening experience with low-power single-ended triode (SET) amplifiers.
		Black Dahlia Acoustics, Ltd. is committed to offfering the loudspeaker DIY hobbyist the opportunity of enjoying great sounding speakers, at a fraction of retail cost.
		This loudspeaker family brings out the best possible sound from twin-cone full-range and wide-range driver technology, without subjecting oneself to any of the traditional problems such as lack of bass.
	store.hifiauthority.com /olsherkits.html (782 words)

	Loudspeaker Tutorial \| Acoustics, Audio and Video \| University of Salford - A Greater Manchester University
		To avoid these problems, we can mount the loudspeaker in an infinite baffle, in which case it radiates into the "half space" in front of the baffle as a monopole.
		We specify sensitivity of a loudspeaker in terms of dB SPL for 2.83 V input.The sound pressure level is measured on-axis in anechoic conditions at a distance of 1 metre from the loudspeaker.
		Such a strategy is achieved by the "phase inverter" family of loudspeaker enclosures, which couple front and back radiation from the low frequency unit(s) through an acoustic phase inverting network.
	www.acoustics.salford.ac.uk /acoustics_info/loudspeakers (1392 words)

	Model A3 In-Wall Speaker (Site not responding. Last check: 2007-10-17)
		The loudspeaker has a rigid frame which attaches directly to standard structural framing without the need for special mounting brackets.
		The edges of the panel are tapered similar to the edges of gypsum wallboard, providing the room necessary for normal wallboard tape and joint compound to be used to feather the speaker seamlessly into the wall or ceiling.
		Stealth Acoustics speaker invisibility allows for powerful advantages over other loudspeakers as they can be placed wherever they sound best, free of visual concerns that may conflict with architectural features.
	www.stealthacoustics.com /pages/A3.htm (390 words)

	Anthony Gallo Acoustics Nucleus Micro Loudspeaker System review (Site not responding. Last check: 2007-10-17)
		Gallo Acoustics was successful in its appeal to the audiophile market with a number of speaker models.
		The total price is $699, which includes all three speakers plus all wiring to connect them to your amplifier or receiver and rubber rings for placing them on shelves or, in the case of the subwoofer, on the floor.
		Undoubtedly there are going to be audiophiles who tweak these speakers with their own wire and will likely even try using a second sub for stereo sub-woofing and maybe even a second set of satellites.
	www.roundsound.com /reviews_legacy8.html (2803 words)

	PSN Column (Site not responding. Last check: 2007-10-17)
		A standard component of the planning process is the acoustical modeling software that allows the sound reinforcement system design to be developed while the building design is still on paper (or its CAD equivalent).
		The acoustical model can provide insight into the rooms acoustics, the loudspeaker system performance and even the interaction between loudspeaker and microphone.
		There are a few other acoustical academic and proprietary programs that provide modeling and analysis of room acoustics and loudspeaker performance, including some very simple programs intended for loudspeaker layout in the design of paging systems and background music applications.
	www.mcsquared.com /psn0601.htm (834 words)

	SoundStage! Equipment Review - Quintessence Acoustics Standard Loudspeaker (3/1999)
		The crossover is deemed a fourth-order acoustic topology.
		Tom Campagna explained that "acoustic" simply means the total filter network achieves its results with both a passive network (the crossover) and in the way the drivers are mounted (in other words the type and size of box they are loaded into).
		The Quintessence Acoustics Standard speaker is not a speaker whose character you immediately grasp as soon as you burn it in and take your first listen.
	www.soundstage.com /revequip/duvall08.htm (2564 words)

	The VISATON NoBox BB Loudspeaker Kit Review By Dick Olsher
		One of the main reasons the QUAD-57 electrostatic loudspeaker, or for that matter any other good planar speaker, sound so natural (i.e., non-boxy) in the midrange is directly due to the absence of boxy cavity resonances that serve to obscure midrange detail.
		It has been argued by some (e.g., Gradient Loudspeakers) that because a dipole radiator excites fewer room modes relative to a conventional box speaker with its omni-directional bass output, bass response at the listening seat should exhibit a smoother response.
		While it is not clear to me that this represents a valid conclusion for all rooms and setups, one thing is certain: a dipole woofer is bound to sound different relative to that of a box speaker.
	www.enjoythemusic.com /magazine/equipment/0606/visation_nobox_bb_loudspeaker.htm (2706 words)

	Advanced Ribbon Technologies “METRO” Loudspeaker System (Site not responding. Last check: 2007-10-17)
		The Metro loudspeaker defines a technological leap in ribbon loudspeaker design: it is the first ribbon loudspeaker in history that combines the incredible dynamics of an enormously powerful motor moving a nearly massless diaphragm with wide, even dispersion pattern in both the horizontal and vertical domains.
		No other planer loudspeaker ever built has this kind of radiation pattern, and it was really surprising to hear how the sound field jells (for lack of a better term) when one is standing and walking about in the listening room.
		George founded North Acoustics in 2001, a company dedicated to employing the most advanced drivers, crossover components, cabinet technologies and manufacturing methods to design and produce the world's finest conventional loudspeaker systems.
	www.advancedribbontechnologies.com (2790 words)

	Integral Acoustics: LARA Main page
		Loudspeakers can be configured in clusters which can then be added to the room and oriented as a single unit.
		Loudspeakers arranged in regular patterns can be quickly configured as clusters using array definitions.
		The room can be viewed in 3-D wireframe and a probe can be used to determine the SPL, distance from loudspeaker and loudspeaker angles for a selected point.
	www.integralacoustics.ca /lara.htm (569 words)

	Gershman Acoustics Reviews
		Each loudspeaker is the result of painstaking design, exhaustive listening tests and accurate measuements.
		Through regular use of these facilities, Gershman Acoustics applies the most advanced loudspeaker testing techniques to each of their designs, a scientific rigor which many companies can only dream of.
		Through skilled engineering, thoughtful design and measurement verification, Gershman Acoustics produces loudspeakers that are a genuine pleasure to listen to and are regarded as truly world-class.
	www.gershmanacoustics.com /nrc.html (185 words)

	The Absolute Sound: Gallo Nucleus Reference 3 Loudspeakers and Subwoofer Amplifier (Site not responding. Last check: 2007-10-17)
		The really neat part, though, was that the sonic images within the soundstage led lives of their own, deliciously detached from the physical presence of the speaker enclosures.
		These shifts could be due to the large woofer excursions incurred with use of the sub amp, or they could be the result of voicing differences between the sub and main amps, but in any event they are subtle, sounding like a barely perceptible thickening of the sound in the bottom octave and a half.
		s are rewriting the book on value in high-end loudspeakers, making accessible a level of performance that might previously have been far beyond reach for most of us.
	www.theabsolutesound.com /newsletter/150/gallo.html (1673 words)

	Avalon Acoustics (Site not responding. Last check: 2007-10-17)
		Ayre Acoustics, at the Debbie Reynolds Hotel, showcased their new mono block amps, the M-1’s and K-1 Preamplifier and all Cardas cabling with the Avalon Acoustics Eclipse loudspeaker.
		This one of a kind Avalon Acoustics speaker was designed specifically for Dr. Keith Johnson, noted recording engineer and audio component designer and builder.
		Avalon Acoustics plans to introduce a consumer version of the ‘Studio’ later in the year for its broad distributor network and growing dealer network.
	www.avalonacoustics.com /press02.html (473 words)

	Audio Acoustics Sapphire Ti-C SE
		The Audio Acoustics Sapphire Ti-CSE Speaker is the third in a family of speakers that not so much challenges other speakers, it just makes them obsolete.
		Worlds First Unique “Double Float” mounted resonance Sapphire HF The hf unit is mounted on a resonance controlling membrane, which in turn is bonded to the sub front baffle; under this is a second resonance-controlling polymer.
		The nano puck eradicates resonance being fed into the loudspeaker system from the environment etc., and more importantly removes further the interaction between the function of the loudspeaker and its surroundings, as well as secondary isolation.
	www.audioacoustics.co.uk /models/audioacousticssa.html (2017 words)

	Linkwitz Lab - Loudspeaker Design
		You can use the information in these pages to learn about sound reproduction, room acoustics, loudspeaker design and related subjects in order to build your own speakers, to understand the theoretical background behind different designs, or to optimize what you own.
		To further your understanding of loudspeaker design you might read a ground breaking "Loudspeaker System Design" article, which was published 1978 in Wireless World magazine, and review the many considerations that enter into speaker design.
		Consider a pair of reference earphones that you equalize to your hearing in order to find out what is really on the CD you have been listening to, and what your room and speakers are contributing.
	www.linkwitzlab.com (1584 words)

	Aesthetics Trump Acoustics in Custom Loudspeaker Market
		The rise of the custom market may have taken speakers off the floor and into the wall, but installers were still pitching rectangular in-wall speakers almost solely on the basis of sound quality.
		The company has broken new ground with its Architectural Series of loudspeakers, which are specifically designed to complement the interior design of a room rather than compete with it.
		Sonance dubs the speakers in the Architectural series the “first truly flush-mount loudspeaker.” The speakers align the plane of the grille with the plane of a wall or ceiling, dramatically reducing the visual impact of the installation.
	www.svconline.com /resav/custom_loudspeaker_market_11062006 (591 words)

	Stereophile: Vienna Acoustics Mozart loudspeaker
		Waltzes and strudel, yes; loudspeakers, no. One exception is Vienna Acoustics, a company that has introduced a line of loudspeakers named after composers: Mozart, Bach, Beethoven, and Haydn.
		At the 1996 Las Vegas WCES, Sumiko, US distributor of Vienna Acoustics products (footnote 1), demonstrated the second-from-the-top Mozart, and Stereophile reviewers as diverse in their approaches as Jonathan Scull, Tom Norton, and Sam Tellig (as well as yours truly) were unanimous in our admiration of the sound.
		I knew that the Vienna Acoustics factory provided optional foam plugs for the ports; John had told me that he didn't like the effect of these plugs, so he didn't ship them.
	www.stereophile.com /loudspeakerreviews/197vienna (1198 words)

	Solens full range of Home Hi-Fi Audio Drivers
		HEMP ACOUSTICS is a partnership, founded by a group of dedicated, professional entrepreneurs that have been in the audio industry for over 20 years.
		With more than 30 years of experience in the field of acoustics and loudspeaker technology and a future oriented engagement in research and development, plus the high quality standard of our production, we are nowadays a specialised and world wide successfully operating German loudspeaker manufacturer.
		VOLT loudspeakers, made in England.The Volt range of loudspeaker chassis are designed to offer clean, uncolored sound with smooth frequency response characteristics that allow simplified system design.
	www.solen.ca /driver.htm (695 words)

	Legend Acoustics KANTU Loudspeaker SPECIFICATIONS
		The Kantu loudspeakers are elegant, world-class instruments designed and built in Australia to give you maximum enjoyment when you listen to your music or watch home movies.
		They cover the full range of music frequencies, from very deep bass to sparkling highs and have the fast, open sound that makes all Legend loudspeakers so famous.
		Many of our dealers now believe it is one of the best loudspeakers they have ever heard regardless of price.
	members.iinet.net.au /~legends/kantuspe.htm (202 words)

	press04
		However, some of the larger acts coming through were insisting on using their own loudspeakers, which meant we had to pull ours down, fly theirs for a night, and then put ours back up.
		Although most of the theater is acoustically treated, a large glass lighting booth on the rear wall had previously been the source of many audio-related headaches.
		Room geometry and loudspeaker locations are defined in 3D and simplified operating modes permit the user to work in 2D to rapidly enter data.
	www.l-acoustics.com /site-US/press04us.htm (6239 words)

	Samadhi Ichiban Review
		It's a believable rendering of the entire acoustic space of the recording venue, without the hyped, artificial sharp edged cut-outs that I attribute to the "surreal school" of hi-fi imaging.
		Both acoustic and electrical means are used to contour the directional response of the speaker so that it's omnidirectional up to 2 kHz, and progressively more directional up to 20 kHz.
		Sorry to have to state the obvious, but there may be somebody out there reading this dribble who needs to know why a very good loudspeaker like the Ichiban costs a mere $1,990 a pair, and a state-of–the–art speaker costs $12,500.
	www.blackdahlia.com /samadhi/ichibanrel.htm (2414 words)

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