15 Oktobar 2007 / 15 October 2007

Novi proizvod - New product

Za vreme reprodukcije zvuka zvučni talasi generisani od strane zvučnika se šire kroz ambijent. Niže frekvencije imaju širi opseg rasprostiranja što u zatvorenim prostorima ima za posledicu pojavu stoječih talasa uglavnom u opsegu od 100 - 500 Hz. Paneli kućišta HiFi uredjaja takodje su podložni ovim talasima i imaju osobinu da stvaraju dalje unutrašnje rezonantne vibracije koje degradiraju zvučnu sliku kompletnog sistema.
Upotreba masivnih blokova na panelima kućišta uredjaja nažalost ne daje rezultate jer se centar vibracija samo pomera.
Sistem koji je Finite Elemente primenio nije zasnovan na teškom spoljnom cilindru već na svojoj unutrašnjoj konstrukciji koja ima specijalne lajsne od čelika u obliku zvezde koje preuzimaju energiju oscilacija prouzrokovanu rezonansom i pretvara je u termičku energiju bez ikakvih akustičkih i mehaničkih povratnih efekata.
Sistem se bazira na "Energy Minimum" principu (dve elastične strukture sa različitim masama aranžiranim u seriji) gde sistem sa manjom masom preuzima kinetičku energiju i pretvara je u termičku energiju. Na taj način se odstranjuju čak i različite vibracije koje se javljaju kada se koriste šasije različitih proizvodjača. Više detalja možete naći na www.finite-elemente.de.

Oscilacija panela / Oscillating housing panel of a hi-fi component

Absorpcija Rezonatora / Housing panel calmed by resonator

Preuzimanje Kataloga Finite Elemete u PDF formatu - Download of Finite Elemete Catalogue in PDF

During music reproduction by living-room hi-fi systems airborne sound waves are generated by the loudspeakers and propagated through the ambient air to our sense of hearing, thus making the music perceptible to us. The lower frequencies have a larger angle of scattering effect so that, for example, even when hi-fi components are positioned in parallel with the speakers their housings are triggered by the sound waves. And it is especially in these lower frequency ranges, between 100 Hz and 500 Hz, that we find the first intrinsic frequencies of the hi-fi component housing panels where these begin to tend to resonance vibration, thus regenerating feedback that has an interfering effect on the overall sound image of the system.

Silencing the intrinsic frequency ranges of the component housing panels, for example by using mass blocks, is of no help here, because then the newly generated intrinsic frequencies are affected by the broadband music spectrum meaning that the interfering effects on the sound are only displaced.The resonator system described here is therefore not based on the external mass-bearing cylinder but on its inner construction:

The resonator housing contains the actual resonator, in comparison with the housing panel of the amplifier or CD player, is a small elastic special star-shaped steel rod that takes over the panel oscillation energy across a broad band and converts this to thermal energy in the housing interior without any acoustic or mechanical feedback effects. This process is based on the energy minimum principle, whereby with two excited elastic structures with different masses arranged in series the system with the smaller mass takes over the kinetic energy of the system with the greater mass and converts this into heat assuming that the intrinsic frequency of the smaller system is tuned to the excitation frequency – in the case of resonance to the intrinsic frequency – of the larger system. The energy loss of the greater mass – in this case the housing panel of the hi-fi component – minimises the sound-interfering feedback effect. A special treatment of the resonator helps to remove broadband vibration in music reproduction, and in this way even different component chassis from different manufacturers with different fundamental intrinsic frequency ranges in the housing panels can be calmed. More details can be found at www.finite-elemente.de.