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Topic: Sound quality

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Dolby noise reduction system

	Sound Quality or Timbre
		Timbre is mainly determined by the harmonic content of a sound and the dynamic characteristics of the sound such as vibrato and the attack-decay envelope of the sound.
		The primary contributers to the quality or timbre of the sound of a musical instrument are harmonic content, attack and decay, and vibrato.
		It is common practice to characterize a sound waveform by the spectrum of harmonics necessary to reproduce the observed waveform.
	hyperphysics.phy-astr.gsu.edu /hbase/sound/timbre.html (749 words)

	Sound Quality Terms and Definitions
		Arithmetic mean sound pressure level: Of several related sound pressure levels measured at different positions or sound pressure levels measured at different positions or different times, or both, in a specified frequency band, the sum of the sound pressure levels divided by the number of levels.
		Sound transmission coefficient, r: [dimensionless]---of a partition, in a specified frequency band, the fraction of the airborne sound power incident on the partition that is transmitted by the partition and radiated on the other side.
		Sound transmission loss, TL: Of a partition, in a specified frequency band, ten times the common logarithm of the ratio of the airborne sound power incident on the partition to the sound power transmitted by the partition and radiated on the other side.
	www.owenscorning.com /around/sound/definitions.html (6963 words)

	Sound Quality Glossary Terms
		Sound energy, E: [ML2T-2]; J-energy added to an elastic medium by the presence of sound, consisting of potential energy in the form of deviations from static pressure and of kinetic energy in the form of particle velocity.
		Sound intensity, I: [MT-3]; W/m2 the quotient obtained when the average rate of energy flow in a specified direction and sense is divided by the area, perpendicular to that direction, through or toward which it flows.
		The effect of sound on an individual receiver is usually evaluated by measurements near the ear or close to the body.
	www.owenscorning.com /around/sound/glossary.asp (7146 words)

	Adobe - TechNote : How can I get the best sound quality? (Site not responding. Last check: 2007-10-21)
		In order to get the best quality sound for the smallest file size and performance hit, you must consider what the content of the sound is. Too often, movies use a blanket 8-bit 22kHz sound format when that may not be appropriate.
		So a sound recorded at 16 bits and 44.1 kHz is actually a sound that has been sampled 44,100 times per second and each sample has a bit depth of 16 bits.
		Due to the time it takes to mix the sounds, there can be a noticeable delay bertween the time the command to play the sound is issued and when it actually begins to play.
	www.adobe.com /cfusion/knowledgebase/index.cfm?id=tn_480 (1238 words)

	Sound Quality Acoustical Wall Panels
		Sound Quality® Acoustical Wall Panels by Sound Seal® are the solution for areas that require noise reduction and are available in a variety of models for various applications.
		Sound Quality Wall Panels can be manufactured in standard Guilford FR 701 fabirc, designer of C.O.M. fabric in standard or custom sizes up to 5' x 10'.
		Application for Sound Quality Panels includes, schools, offices, airports, churches, restaurants, gymnasiums, prisons, corridors, classrooms, conference rooms, auditoriums or any area where noise is a problem.
	www.soundseal.com /soundquality/wall-panels-home.shtml (92 words)

	HEAD acoustics: Sound Quality
		The appropriateness of a sound is determined by its many cognitive aspects: A door closure of a vehicle can relate to a vehicles overall structural quality, an engine sound can give a sense of power, and an electric motor driven device can emit a sound indicating smooth operation.
		Sound design is the art of using the understanding of sensory attributes and their affect on consumers to determine the most desirable sounds to have for the various modes of a product's operation.
		The sound quality indexes which were developed are helpful for quality audits and determining critical parts of the manufacturing process to control to assure consistent quality.
	www.headacoustics.com /sound_vibes/products/sound-quality.html (1179 words)

	Quality and Functionality Factors for Sound (Audio)
		The sound elements may be short sections of waveform sound (sometimes called samples or loops) or data elements that characterize a sound so that a synthesizer (which may be in software or hardware) or sound generator (usually hardware) can produce the actual sound.
		For example, stereo or two-channel sound represented in linear PCM content typically employs an interleaved structure (alternating the information from the two channels), while surround-sound or multi-channel content employs additional data that is matrixed into two interleaved channels and decoded at playback time.
		Support for downloadable or user-defined sounds, samples (loops), and patches applies to note-based formats, and refers to the degree to which a format permits references to or the inclusion of digital sound data and the articulation parameters needed to create one or more voices or instruments in a musical presentation.
	www.digitalpreservation.gov /formats/content/sound_quality.shtml (1849 words)

	Macromedia - Director TechNote : How can I get the best sound quality? (Site not responding. Last check: 2007-10-21)
		In order to get the best quality sound for the smallest file size and performance hit, you must consider what the content of the sound is. Too often, movies use a blanket 8-bit 22kHz sound format when that may not be appropriate.
		So a sound recorded at 16 bits and 44.1 kHz is actually a sound that has been sampled 44,100 times per second and each sample has a bit depth of 16 bits.
		Due to the time it takes to mix the sounds, there can be a noticeable delay bertween the time the command to play the sound is issued and when it actually begins to play.
	www.macromedia.com /cfusion/knowledgebase/index.cfm?id=tn_480 (1228 words)

	Sound quality
		The sound should appear to come from the front of the car ("front staging"), ideally the artists should appear to be standing on the bonnet or at least on the dash.
		The average CD has such poor sound quality that it is not the system that fails but the recording quality on the CD.
		When sound quality is less important but music is, I prefer listening to music by Cathy Dennis, Mylene Farmer, Debbie Gibson, Transvision Vamp or Suzanne Vega.
	www.suzuki.cybercomm.nl /sound.html (1084 words)

	PSN Column
		A sound system becomes familiar to the operator after a short period of use, and complaints voiced by those with "fresh" ears are often regarded as unfounded.
		A great many mediocre sound systems can fall into this gap and still be viewed by their owners and operators as OK. As an industry, we must struggle against this easy acceptance and strive for excellence.
		I have often heard clients state that sound quality in this space (theatre, church, arena, classroom, etc.) is of paramount importance but when it finally comes down to issues of cost and compromise, sound may quickly move to the bottom of the priority list.
	www.mcsquared.com /psn0498.htm (692 words)

	Internet Sound Institute - Automatic Mixer for Drama
		First of all, a high quality sound system, properly operated, can help the actors and actresses project their voices to every seat in the house.
		Otherwise, there would be a very dramatic difference between the sound quality of actors with a wireless microphone and those without one.
		As the actors move a little, the sound quality will also vary, which means unnatural sound to the audience.
	www.soundinstitute.com /article_detail.cfm/ID/19 (1176 words)

	Sh-hit sound quality on your Creative Zen V-plus too??? - MP3 Players - Creative Labs
		Personally, the sound quality is ‘dreadful', actually 'sucks' would be a better word.
		I didn’t have the thought of; the ‘sound quality’ that the player produces on my mind as I was buying it, and if I knew I certainly wouldn’t have bought it.
		Sound quality should come first, the player could be the ugliest of all but it all comes down to the sound quality.
	forums.creative.com /creativelabs/board/message?board.id=dap&message.id=172028 (249 words)

	Core Sound Binaural Microphones (tm)
		I personally thought that it sounded better than what I had heard because I was using the bass roll-off filter and all the low end was gone which left a clean crisp hit of the bass drum and tom toms.
		Sound was high on decibels, great on energy, but I gave up thinking that my recording setup would result in anything other than overloaded boom sounds.
		The overall sound is smooth and extremely "present", and several people have remarked that they thought the DAT recording seemed "better than the original," a remark that these little mics seem to inspire quite often.
	www.core-sound.com /mics.html (22489 words)

	RH Lyon Corp — Noise and Vibration Control for Quiet Product Design
		Arguably the most familiar example of the correlation between a product’s sound and the perception of the product’s quality is the sound of a car door closing.
		The sound of a washing machine can be divided up into component parts for each phase of operation.
		A clicking sound is introduced so the user knows that the stove is in the process of lighting the burner, rather than filling up the house with gas.
	www.lyoncorp.com /soundquality.html (653 words)

	XM Radio - Fast Facts - Superior Sound Quality (Site not responding. Last check: 2007-10-21)
		The technologies that define XM Satellite Radio sound quality have been auditioned and endorsed by leading audio experts from around the world.
		The superior XM sound quality experience in the car and home begins in XM's Digital Broadcast Center, where it creates and integrates its 101 state-of-the-art audio channels.
		The road test results were corroborated by Sound & Vision Technical Editor David Ranada, who conducted an additional comparison in the magazine's offices to ensure that the results were attributed to the satellite signals and not the car electronics.
	www.xmradio.com /corporate_info/fast_facts_sound.html (502 words)

	Sound Quality - Brüel & Kjær
		The sound quality of the noise from a product is of ever-increasing importance when assessing the total quality of the product.
		Sound Quality Software Type 7698 is the core of your sound quality analysis system.
		Psychoacoustic Test Bench Type 5301 is an advanced option to Sound Quality to assist in the tasks of: design...
	www.bksv.com /604.asp (218 words)

	Adding sound into a web page.
		Netscape's tag is slightly different, you can use its attribute to select playing sound when the page is loaded or give the users an option to click whether they would like to hear the sound.
		The sound quality is not as good as MIDI, but the file is smaller.
		The sound quality is poor, but the file is quite small, used for recording short speech.
	www.tips-tricks.com /sound.asp (923 words)

	HEAD acoustics: HEAD acoustics: acoustics and vibration consulting services
		Sound Quality is the effect a product's sound has on a consumer's overall perception of the product's quality and thus can have a significant impact on the consumer's purchase decision.
		Sound Quality Engineering is a blend of several disciplines: acoustics, psychoacoustics, signal processing, and vibration.
		With unsurpassed expertise, and the most powerful analysis tools available, we are uniquely positioned to offer you Sound Quality evaluation and troubleshooting as well as engineered Sound Quality solutions for emerging technologies such as squeak and rattle testing, vehicle simulation, and end-of-line specification development.
	www.headacoustics.com /sound_vibes/services/consulting.html (646 words)

	Sound Blaster X-Fi
		Sound Blaster X-Fi is an XtremeFidelity Engine sitting at the heart of your PC, freeing up CPU resources so you get a performance boost.
		Sound Blaster X-Fi's immense power also enables the ability to overcome the compromised sound quality of MP3s/CDs, Movie and game audio, which was never possible before because of the limited performance of the PC and previous sound cards.
		Sound Blaster X-Fi transcends the compromised sound quality of MP3 and other low-quality audio and turns it into the most faithful possible recreation of the original sound experience in real-time!
	www.soundblaster.com /products/x-fi/technology/xfiaudio (549 words)

	Q. How does the SACD format achieve higher sound quality?
		It is argued that the steep slopes necessary in these digital filters have an audible damaging effect on the signal quality, and by avoiding the filters, you can avoid the damage and thus remove the 'digital sound' that so many claim to recognise and dislike.
		It sounds a wonderfully elegant approach and a lot of people swear by the sound quality it delivers, but as with all things digital, it's actually a lot more complex and compromised than it first appears.
		Sound On Sound Ltd is registered in England and Wales.
	www.soundonsound.com /sos/aug04/articles/qa0804-4.htm (955 words)

	EliteCarAudio.com : Install Clinic :Sound Quality Part 2
		Reflections cause the sound waves to bounce off the surface and travel in a direct fashion, rather than a radiant fashion, after the interaction.
		When the sound waves reach the enclosure boundary, they can either be absorbed or reflected (we'll get to that).
		Since sound waves possess energy, when they strike the backside of the cone, their energy causes undue forces to be exerted on the speaker cone.
	www.elitecaraudio.com /install_clinic/Sound_Quality_Part_Two (976 words)

	Technology Review: An Audio-Quality Arms Race?
		Audio quality still ranks relatively low among consumer concerns, but early hints of an audio-quality arms race among device makers are beginning to emerge.
		Most of these earlier tactics have been aimed at one of several weak points in the audio playback process: the quality of the digital file itself, the way in which the file is processed by the device, or the quality of the speakers in the earphones.
		But quality still matters and can sometimes be assessed by noting the file's bit rate, which indicates how much of the original file has been maintained in bits per second.
	www.technologyreview.com /read_article.aspx?id=17642&ch=infotech (928 words)

	Car Sound Quality - MagnaFlow Catalytic Converters by Car Sound
		Car Sound converters are seam welded close to the converter body for a strong, tight bond.
		Car Sound uses an aluminized or stainless OEM-style ribbed heat shield that creates a rigid wall of protection against heat and adds to the structural stability of the converter.
		- Car Sound’s converter boxes are made of a heavy gauge corrugated board that is three layers thick at the ends to protect the converters during shipment.
	www.car-sound.com /04basics/04quality.asp (493 words)

	Sound And Vision Magazine - The Dark Side of the Tune
		Instead of advertising sound quality, companies are touting fewer dropped calls.
		The history of sound reproduction is supposed to be mono, then stereo, then surround sound; the noise floor should decrease with each generation, and frequency response should flatten and extend.
		Moreover, the decline (and fall) of phone sound quality mirrors the recent fate of music fidelity.
	www.soundandvisionmag.com /features/1629/the-dark-side-of-the-tune.html (385 words)

	Changing Sound Quality
		The default sound recorder setting is not the lowest possible setting and for most cases it is sufficient.
		If you want maximum quality and have the storage and transportation capabilities for large files, this is an excellent setting.
		Sound settings in PowerPoint are limited to PCM mode (Pulse Code Modulation).
	www.mrgibbs.com /lass/sidebar/sound_quality.html (451 words)

	Sound Quality
		The size of sound files varies with several different parameters: type of compression (if any), amount of compression (bit rate), sample rate, stereo/mono, etc.
		Relatively good music quality can be preserved down to 64Kbits per second.
		At lower sample rates, both the 28.8 and 56K RealPlayer samples are of similar quality to the MP3 32Kbit Flash sample.
	www.csuchico.edu /atec/projects/tigers/soundquality.html (491 words)

	Sound Quality Measurement
		Because masking prevents soft sounds from being heard in the presence of loud ones, the dynamic range of the components comprising a complex signal can be minimized.
		The first is a quality of speech scale that runs from a score of 5 for excellent to a score of 1 for bad.
		For these reasons, although the MOS quality and difficulty scales actually address the issue of speech clarity directly, a more repeatable and objective test method was needed.
	www.evaluationengineering.com /archive/articles/0602sound.htm (1690 words)

	Sound Quality (Site not responding. Last check: 2007-10-21)
		Sound intensity and loudness are often mistakenly interpreted as having the same meaning.
		Sound INTENSITY is a measure of the sound energy of a wave.
		The QUALITY of a sound depends on the complexity of its sound waves, such as the waves shown
	www.tpub.com /content/neets/14182/css/14182_33.htm (248 words)

	ELP Laser Turntable: Sound Quality (Site not responding. Last check: 2007-10-21)
		This means that the LT performs high quality sound reproduction even on vinyl that has been worn by a needle.
		If both the musical recording and the vinyl itself are of high quality, the LT will reproduce excellent sound quality accordingly.
		But if the quality of the recording or vinyl itself is poor, the LT can unfortunately do very little to improve or change the sound.
	www.audioturntable.com /about/sound.html (270 words)

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