Patent ID: 8755552

Claim:
A speaker system with at least two codirectional channels, comprising: a first sound reproduction element associated with a first frequency range; a second sound reproduction element associated with a second frequency range higher than the first frequency range, the first sound reproduction element being disposed in an enclosure and the second sound reproduction element being disposed in front of the enclosure relative to the direction of propagation (X) of a sound wave, the enclosure comprising at least one vent in an enclosure portion extending between the first sound reproduction element and the second sound reproduction element; and means of filtering the frequency ranges comprising at least one high-pass filter associated with the second frequency range, wherein the cutoff frequency (f c ) of the high-pass filter is higher than the natural frequency (f o ) of a resonant cavity defined in part by the enclosure portion, and wherein the resonant cavity is in communication with the at least one vent, wherein the means of filtering the frequency ranges comprises a transition filter having a cutoff frequency (f c ) in a range of frequencies of intersection of the first range of frequencies and the second range of frequencies, the cutoff frequency (f c ) of the transition filter being higher than the natural frequency (f o ) of the resonant cavity, and a maximum cutoff frequency value (f c ) being associated with the transition filter as a function of the first and second frequency ranges associated respectively with the first and second sound reproduction elements, wherein the number and dimensions of the vents are determined so that the natural frequency (f o ) of the resonant cavity created in the enclosure is lower than the maximum value of the cutoff frequency (f c ) of the transition filter.