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Topic: Sound reproduction


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  Sound Recording and Reproduction - MSN Encarta
Sound reproduction, or playback, uses additional devices to retrieve the stored information and convert it back into electrical signals.
Recording and reproduction of sound allow people to play their favorite music, whether it was recorded yesterday or many years ago.
This format is called analog because the form of the sound wave, called the waveform, in the recording is analogous to the original waveform.
encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761552202   (1287 words)

  
 Sound recording and reproduction - Wikipedia, the free encyclopedia
The first practical sound recording and reproduction device was the mechanical cylinder phonograph, invented by Thomas Edison in 1877 and patented in 1878, and in some ways resembled the phonoautograph patented by Edouard-Leon Scott de Martinville in 1857.
In various permutations, the audio disc format became the primary medium for consumer sound recordings until the end of the 20th century, and the double-sided 78rpm shellac disc was the standard consumer music format from the early 1930s to the late 1950s.
The invention of digital sound recording and the compact disc in 1983 brought massive improvements in the durability and sound quality of consumer recordings.
en.wikipedia.org /wiki/Sound_reproduction   (3048 words)

  
 OUR LOSS OF EMOTIONAL RICHNESS DUE TO BAD SOUND REPRODUCTION
Sounds and the emotions conveyed by them are too much a part of the make-up of society as a whole as well as our individual lives for this to be anything less than a universal tragedy.
Since sound reproduction media is the chief source of our sonic impressions and ”canned” sound is becoming ever more unavoidable in our lives, a vast aspect of the future of humanity actually rests on the outcome.
Its papers on sound reproduction, problems of focusing in photography, psychology of hearing and seeing, and erratic vibrational influences that affect our lives are widely distributed throughout the world.
www.anstendig.org /LossOfEmotion.html   (2455 words)

  
 CEC - eContact! 7.2
So, just like for the hi-fi sound reproduction, it is possible to suppose that the faithful reproduction of the spatial character of the auditory experience can join in a long-standing tendancy of the human society regarding reproduction, or representation.
Binaural technologies (4) for the spatial sound reproduction thus belongs to the simulation of the perception because this solution includes a part of the chain of the auditive perception, which is, in that case, the external ear.
The conventional techniques of sound recordings and stereophony base themselves as for them on the observation, or the more or less empirical knowledge, of perceptive phenomena to establish guidelines for manual mixing (as for phantom imaging by means of intensity stereophony or time stereophony).
cec.concordia.ca /econtact/Harvest_Moon/Gauthier_e.html   (2840 words)

  
 Spatial Audio Reproduction: Toward Individualized Binaural Sound   (Site not responding. Last check: 2007-10-20)
The perceptual cues for sound localization include the amplitude of the sound at each ear, the arrival time at each ear, and the spectrum of the sound, that is, the relative amplitude of the sound at different frequencies.
The spectrum of a sound is modified by interactions between sound waves and the torso, head, and external ear (pinna).
The sounds are shifted to the side as a result of the dominance of low-frequency time-delay cues in lateral localization; the cross-talk cancellation works effectively at low frequencies to provide this cue.
www.nae.edu /NAE/bridgecom.nsf/weblinks/MKEZ-695TMR?OpenDocument   (2653 words)

  
 Equalization of Sound Systems
The process of leveling out the frequency response of the sound system removes the peaks which will ring the system before sufficient gain is achieved.
The basic idea of room equalization is for the sound system to produce in the room exactly the same signal which is put into the system.
The sound of white noise is similar to the sound of steam escaping from an overheated radiator.
hyperphysics.phy-astr.gsu.edu /hbase/audio/equal.html   (460 words)

  
 Accusound Ultimate Sound Reproduction
The sound originates in the vibrations induced, by bowing, plucking or striking tensioned strings and is then amplified by means of some sort of sound-board.
The sound is produced by vibrating the lips, as in the trumpet, or from the eddy effect produced by blowing at the edge of an opening in the body of the instrument, as in the flute, recorder or pan-pipes.
The characteristic sound is due to a combination of the reed and the small chamber in which it is mounted.
www.accusound.com /parametric.html   (2312 words)

  
 Home Page   (Site not responding. Last check: 2007-10-20)
The sound clips presented should not be regarded as a definitive final result, only as a proof-of-principle demonstrations or test of these optical methods.
In the first, described in detail in the JAES paper (pdf file), methods of two dimensional (2D) imaging were used to map a portion of the surface of 78 r.p.m.
The 2D imaging focused on the groove bottom and sound was reconstructed from a measurement of its trajectory.
www-cdf.lbl.gov /~av   (1078 words)

  
 Multi-dimensional sound reproduction system - Patent 5850457
A network in accordance with claim 1 wherein said receiving means and said deriving means of the multi-dimensional sound reproduction network are provided as an external conversion adaptor for receiving and combining the audio left channel and the audio right channel signals for delivering the plural signals to separate and external loudspeakers.
Modern day stereo audio reproduction systems provide sound reproduction more realistic than monophonic systems because two (2) soundfields are utilized to give the listener an impression closer to that of a live performance which generates sound from multiple sources located at multiple points in space relative to the listener.
Multi-dimensional sound reproduction is achieved with a loudspeaker enclosure having a multiply-segmented face portion having a centrally located binaural voice coil loudspeaker facing directly forward from the face portion of the enclosure into the defined listening area.
www.freepatentsonline.com /5850457.html   (3073 words)

  
 Soundlabs Group - Manger Development & Philosophy   (Site not responding. Last check: 2007-10-20)
This mechanism is very powerful because it is the descendant of a highly evolved survival technique from the dawn of mankind, where the slightest noise, such as the snapping of a twig, would represent a threat to survival.
The sound becomes unrealistic, the stereophonic image is impaired and the result is listening fatigue.
It is just as important to be able to reproduce natural sound such as birdsong and the wind in the trees where the only human contribution is the sound of a distant church bell.
www.soundlabsgroup.com.au /manger/manger_development.htm   (1243 words)

  
 Reproduction of Sound   (Site not responding. Last check: 2007-10-20)
Edison used a megaphone to capture sound and then by way of a diaphragm, mechanically impress the incoming vibration (by way of a stylus connected to the diaphragm) onto a revolving cylinder of soft wax.
Once the sound wave was captured as a physical track on the cylinder, replicas of the revolving cylinder were able to recreate the sound wave by way of a needle with attached diaphragm.
The energy in a sound wave is changed from one form of energy to another repeatedly until sound finally reappears at the output of the system.
www.cosmos2000.org /audio/repro.htm   (1262 words)

  
 STEREOPHONIC REPRODUCTION FROM FILM   (Site not responding. Last check: 2007-10-20)
The music or drama so enhanced is then re-recorded on film, with the result that upon reproduction, a musical interpretation is possible that would be beyond the power of all original orchestra, speaker, or singer to produce.
With music and sound so universally recorded on film for sound pictures, there would seem little difficulty to those not technically familiar with sound-picture systems in recording and reproducing a three-channel stereophonic program.
As the conductor listens to the reproduction of the original recording, he manipulates these controls, and another film record is made of the enhanced program.
www.widescreenmuseum.com /sound/stereo1940.htm   (1638 words)

  
 Sound Lab A-3 - full-range electrostatic loudspeaker
The mission of the Renaissance is to provide the finest acoustical reproduction from the lower mid-range to the highest audio frequencies.
A single piece-wise curved membrane provides a cohesive sound source that is free from the anomalies created by the use of multiple drivers.
has four controls to equalize and optimize sound reproduction: one control permits a choice of four gain positions, a second control permits a choice of four mid-frequency levels.
www.soundlab-speakers.com /r3.htm   (351 words)

  
 Welcome to BBE Sound
BBE High Definition Sound is the core sound enhancement technology licensed by BBE Sound and featured in the BBE Sonic Maximizer range of professional audio signal processors.
Sound contractors know that vocal intelligibility is paramount to a successful PA installation and client satisfaction.
Percussive and plucked sounds are clear and sharp, chords are rich and full-textured, each note in the chord retains its integrity.
www.bbesound.com /technologies/BBE_HDS   (1512 words)

  
 Sound Reproduction
To the degree that it has been possible to capture and store the sound of such event, it should be possible to reproduce it in all its dynamics, subtleties of expression and tonal range without adding, removing or falsifying any part.
It is difficult to describe the quality of a sound reproduction system in words, unless there is some agreement on the vocabulary.
Besides, the sound of the piano is nothing like what I am familiar with when the stereo microphones are placed under the lid, close to the strings and then fed to left and right channels.
www.linkwitzlab.com /reproduction.htm   (2075 words)

  
 Sound
Sound equipment was usually specified by the stage manager and set up by the electric (or light) crew.
Sound reinforcement is the amplification of the performer's voice, sound reproduction is the reproduction of recorded music and sound effects.
The sound board operator must be able to hear the same sound the audience hears.
www.northern.edu /wild/th241/sc19.htm   (1167 words)

  
 Ambiophonics by Ralph Glasgal: Realism in Sound Reproduction -- Part II
But while this technique may be useful in sound amplification systems in halls, theaters or labs, application to the playback of even multi-channel recordings in the home seems doubtful except for the use of speaker arrays at the sides and rear or even overhead to deliver truly diffuse, reconstituted reverberant ambience to the home listener.
In reproduction, speakers surrounding the listener, produce soundwaves that collectively converge at one point (the center of the listeners head) to form the same rarefactions and compressions, including their directional components, that were recorded.
The major advantage of this technique is that it can encompass front stage sounds, hall ambience and rear sounds equally, and that since it is recreating the original sound field (at least at this one point) it does not rely on the phantom image mechanism of Blumlein stereo.
www.ambiophonics.org /Realism2.htm   (1296 words)

  
 Microphone Placement
A far mic may also not be able to bring the level (gain) of the desired sound source (singer, instrument etc.) up to the desired level without risking or causing feedback.
To briefly summarize, phase cancellation occurs when a second mic picks up the same sound at a different time and the sum of the two sounds are sent to the sound reinforcement system (miser, amp, speakers) just enough out of phase that the sound cancels itself out at certain brief instances.
For optimum sound reproduction an instrument mic should be used although a standard vocal mic such as the aforementioned SM58 may get by although an instrument mic will sound noticeable better.
www.sound-expressions.com /articles/page2.htm   (605 words)

  
 Loudspeakers
The other stages in sound reproduction are mostly electronic, and the electronic components are highly developed.
The sound from the back of the speaker cone will tend to cancel the sound from the front, especially for low frequencies.
The free cone speaker is very inefficient at producing sound wavelengths longer than the diameter of the speaker.
hyperphysics.phy-astr.gsu.edu /hbase/audio/spk.html   (621 words)

  
 Alcorn McBride Application Note - An Introduction to Multi-Channel Sound
The number of sound channels in a movie theater (or a living room) is dictated mainly by the limitations of the media, whether it is film or DVD.
Contrary to popular notions, 5.1 sound is not the pinnacle of audio quality; it requires drastic compression to fit six audio channels onto the restricted space of media such as a DVD.
This means delivering sound into only the areas occupied by guests and not beyond, so as to avoid reverberation and echoes that will interfere with sound quality and intelligibility.
www.alcorn.com /library/appnotes/MultiChannelSound/index.html   (1471 words)

  
 Hypersonic Sound System - Gizmo Highway Technology Guide
Since we cannot hear the ultrasonic sound, we only hear the new sounds that are formed by the non-linear action of the air.
The benefit of the HSS system is the ability to direct or focus sound into a tight beam, similar to the beam of light from the flashlight.
The opportunities for applying this characteristic to the reproduction of sound are limitless.
www.gizmohighway.com /hifi/hssound.htm   (365 words)

  
 FANTASOUND*   (Site not responding. Last check: 2007-10-20)
While an engineer familiar with the complications of sound reproduction may be amazed at the tens of thousands of trouble-free performances given daily, the public takes our efforts for granted and sees nothing remarkable about it.
A point-source of sound has certain advantages for mon-aural dialog reproduction with action confined to the center of the screen, but music and effects suffer from a form of acoustic phase distortion that is absent when the sound comes from a broad source.
In addition to creating the effect of moving the sound around the theater, the controls allowed side to side movements in any plane between the screen and rear wall of the house.
www.widescreenmuseum.com /sound/Fantasound1.htm   (4472 words)

  
 Meyer Sound : The Sound Lab
On December 30, 2003, Meyer Sound was awarded a patent for the REM ribbon emulation manifold waveguide, an innovative design at the heart of Meyer Sound's line array and curvilinear array loudspeakers.
Meyer Sound's core philosophy is that the goal of any sound reinforcement system is to please, motivate or direct an audience of any size, in any environment.
In November 1994, Meyer Sound began the design and construction of an anechoic chamber — an essential tool that enables the design of loudspeaker systems that perform precisely as specified in critical sound reinforcement applications.
www.meyersound.com /products/technology   (1002 words)

  
 3DsoundSurge Reviews: Klipsch ProMedia v.2-400  vs Videologic Sirocco Crossfire - Page 7
However, this is not the upper limit of musical instruments as the important harmonics produced by all non-electrical instruments are of even higher frequencies, as high as 16,000 Hz to 17,000 Hz for violins and cymbals.
When it comes to sound reproduction, nature has further complicated matters as our ears are not nearly as sensitive to high or low frequency sounds as they are to the midrange, especially to those frequencies between 1,000 and 2,000 Hz.
Another way you may see this described is sound reproduction without coloration or coloring of the sound.
www.3dsoundsurge.com /reviews/procross/provscrossp7.html   (1482 words)

  
 Welcome to BBE Sound
The sound character remains unchanged while the sound quality is improved.
Delicate sound often masked by other louder sound (such as drum brushing behind other instruments or vocal) reappears.
The result is natural and clear sound for the hard of hearing.
www.bbesound.com /technologies/BBE_M3   (539 words)

  
 Massing of Overtones in Sound Reproduction
Every sound consists of the actual sound that is produced, called the fundamental, as well as the overtones and undertones; to a large degree, the number of overtones and undertones and their loudness, relative to the fundamental, determines the character of a sound.
When sounds are recorded and played back, all the sounds that emanate from the loudspeaker become fundamentals, even those that are the overtones and undertones of fundamentals in the sounds that were recorded.
The harmonics that are added by the playback process blur the sound textures, especially within the general range of the fundamental notes, and add shrillness by emphasizing the high frequencies.
www.anstendig.org /Overtones.html   (568 words)

  
 3DsoundSurge Reviews: Labtec Edge-418 Flat Panel Speakers - Page 5
Systems with more neutral/uncolored sound, that is more flat frequency response, are generally considered more pleasing to listen to.
A system that colors audio in a certain way may sound a bit exciting at first, but typically the more you listen to it, the more likely you are to get irritated/annoyed by some aspect of the sound reproduction.
The difference in frequency response and the effect it have on the sound overall is not only significant compared to systems with a separate tweeter but also most single driver cone based systems I’ve heard.
www.3dsoundsurge.com /reviews/Edge418/Edge418-p5.html   (932 words)

  
 Sound Blaster - Purest Audio, Richest Sound   (Site not responding. Last check: 2007-10-20)
I would recommend Sound Blaster products to anyone who cares about their computer.
In Fact, I took the Sound Blaster card from my old computer and put it in my new computer.
The quality and sound reproduction leaves the other products behind.
www.soundblaster.com /contests/drchesky   (148 words)

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