Efficient resonant loudspeakers with large form-factor design freedom

Ronald M. Aarts, Joris A M Nieuwendijk, Okke Ouweltjes

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

8 Citaties (Scopus)

Uittreksel

Small cabinet loudspeakers with a flat response are quite inefficient. Assuming that the frequency response can be manipulated electronically, systems that have a nonflat sound-pressure level (SPL) response can provide greater usable efficiency. Such a nonflat design can deal with very compact housing, but for small drivers it would require a relatively large cone excursion to obtain a high SPL. A new solution is presented that uses a resonant combination of a coupling volume and a long pipe-shaped port. In this structure the efficient resonant coupling of the driver to the acoustic load enables small drivers with modest cone displacement to achieve a high SPL. Due to the high and narrow peak in the frequency response, the normal operating range of the driver decreases considerably. This makes the driver unsuitable for normal use. To overcome this, a second measure is applied. Nonlinear processing essentially compresses the bandwidth of a 20-120-Hz 2.5-octave bass signal down to a much narrower span, which is centered where the driver efficiency is maximum. This system allows very compact loudspeakers. An experimental example of such a design is described, and a working prototype is discussed. The new loudspeaker is compared with a closed cabinet and a bass-reflex cabinet using the same drivers. It appears that the new loudspeaker has the highest output in its working range.

Originele taal-2Engels
Pagina's (van-tot)940-953
Aantal pagina's14
TijdschriftJournal of the Audio Engineering Society
Volume54
Nummer van het tijdschrift10
StatusGepubliceerd - 1 okt 2006

Vingerafdruk

Loudspeakers
loudspeakers
form factors
sound pressure
Acoustic waves
frequency response
Frequency response
Cones
cones
reflexes
octaves
Acoustics
prototypes
Pipe
bandwidth
Bandwidth
acoustics
output
Processing
Sound

Citeer dit

Aarts, Ronald M. ; Nieuwendijk, Joris A M ; Ouweltjes, Okke. / Efficient resonant loudspeakers with large form-factor design freedom. In: Journal of the Audio Engineering Society. 2006 ; Vol. 54, Nr. 10. blz. 940-953.
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Efficient resonant loudspeakers with large form-factor design freedom. / Aarts, Ronald M.; Nieuwendijk, Joris A M; Ouweltjes, Okke.

In: Journal of the Audio Engineering Society, Vol. 54, Nr. 10, 01.10.2006, blz. 940-953.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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