Text preview for : Chronique_d_une_verite-fr-En.pdf part of Cabasse Cabasse French and english.
Basic principles for the production of speakers of the highest quality at the time of Georges Cabasse designer and entrepreneur. Translation of a contemporary document with the help of google translate ...
Back to : Chronique_d_une_verite-fr | Home
A ORIGINAL SYSTEM
Even more precise! Four measurement microphones are All acoustics laboratory worthy of the positioned, respectively: name boasts an impressive fleet of - 1 m in the axis of the enclosure, measuring devices. At CABASSE found - Close to the medium, more original tool, - Close to the tweeter, for each model, an analysis of the - At the rear of the enclosure. highest accuracy. Commissioned in 1982, but officially presented at the Salon of components in 1985, this system was the subject of several years of study. Sheet: - Capacity: all electroacoustic measurements. - Control: Digital. - Control: microcomputer CABASSE. So are we going to discover the local response and distortion curves assigned to each speaker. But we also detect the low vibration due to insufficient fixing or defective bonding cabinet ... What time do you think! Can we control and high production?
MEASURING AREAS For nearly 30 years, the 2,000 m³ of anechoic chamber of Brest spread in the world the image of an eternally turned towards measuring manufacturer and listening.
Furthermore in 1984, the Research Department Pure has been assigned a particular room to conduct its own tests without interruption.
In fact, we have this tool specializes in the automatic production control: to highlight the defects and remedy instantly, it is the spirit of the measure. But in practice? Each speaker, considered as a single object, is entrusted to a specialist assembly and control. Warning ! Personal responsibility involved! It includes investigations of rigor on five key parameters: - Response curve, - Impedance curve, - Distortion curve, - Loudspeakers phase - Parasitic vibrations.
If the computer registers a positive response from the speaker to the impressive all of these tests, it controls its output anechoic chamber and directs it to the package. Of course, the obtained results are automatically stored and archived on floppy. They form the enclosure of the personal file. We will consult it for verification, maybe in twenty years only. Furthermore it will be used for statistical processing of manufacturing and to the continuous improvement of our products. But if the computer finds the slightest drift, it detects the troublemaker element spontaneously displays the fault and controls the automatic return of the enclosure to the immediate rectification to shop.
In total, it is therefore eight anechoic chambers that continuously officiate at CABASSE. But the scientific preparation of pregnant requires other measurement areas. Do you know that there are also Kergonan: - A reverberation chamber 128 m³ because only the inclusion of sounds emitted by the speaker in all directions to determine the total sound power. - A semi-reverberant room, for the variable acoustics but very close to that of a listening room, reveals the influence of the local speaker.
Oh, one last point! With us, the determination of the nominal power of your speakers, according to EN 45573 NID takes place in an underground bunker 70 m³. Day and night, this measurement space is also available for very highpower tests lasting 300 hours!
At room temperature of 50 ° and with high humidity, we torture the speaker until it is destroyed, then analyzes the causes to improve manufacturing. And the cycle will resume with the new enclosure: destroy, analyze, improve. And it indefinitely ...
respond well to our tests. And our goal is clearly defined: In your living room, you must find the original message from the soloist, by the voices, by the orchestra ...
or band, the band or the orchestra? But there is still a difference ... It is through this test that our truthspeaker finally acquire their passport to the world. Here they are worthy to be installed in your living room. Thanks to their transparency and their neutrality, they will respect the personality of each audio message, classical, jazz, electronic music or jackhammer. Your speaker will have the modesty to yield to the truth and you will rediscover with an ever renewed wonder, each individuality in its infinite richness.
CABASSE: 11 SPACES OF MEASUREMENT STUDY for, PRODUCTION, CONTROL the speakers. Who says better ? We, since before to give each speaker a passport to the world, we believe MANDATORY to submit to the supreme test: instant confrontation with LIVE MUSIC's.
In the same room, we want to record and reproduce a score: it is obvious that it will be enhanced twice the "sound color" of our studio when recording, once reproduction. To act on the "acoustic response" of the room, we often intervene on the coatings, their nature, their thickness. Thus we obtain a short reverberation time, balanced function of frequency: fundamental data to make a comprehensive judgment of the speakers. Do you know that the same requirement is to formulate in your living room? Classic or Jazz, or vibration melody line of a poem, we must now register. And first appreciate the height, direction and exact distance of two microphones. Determined by Georges Cabasse in 1950, our process is directly inspired by the principle of Huygens: the microphones are placed in a position identical to that of speakers during reproduction. It is only under these conditions that the sound can keep intact, its integral truth.
LIVING MUSIC Spaces and the measurement tool created by CABASSE to control the speakers with the utmost scientific rigor. After this exact search comes a trial and truth which is expressed in two words passion: LIVE MUSIC = LIVE MUSIC. Privileged moment the anechoic room and the computer will give way to the supreme judge what the ear of the music lover. One may ask: "Why live music? ". - Because it is the only way to get sound as complete as possible. - Reproduce a recorded disc would be so much easier and cheaper! - Yes, but this would involve reproduction speakers if they are neutral, they would alter the sound of the orchestra alive, particularly transient. For this reason, we exclude from our experience any electronic instrument. But this is our only reservation: classical or jazz music all natural field also
Documentation on request :
Cabasse
22 BD Louise Michel 92230 GENNEVILLIERS Phone : 47.90.55.78 Fax : 47.90.65.35
Start strictly synchronous with the orchestra and the band, then we alternate at regular intervals and by simply switching, listening to musicians and the recording. The game is exciting. What are we listening to right now? The orchestra