Woofer arrangement under a vehicle seat

0001The invention relates to an arrangement under a low-frequency loudspeaker a vehicle seat.

0002Such an arrangement is known from US 5,193,118. Here, the speaker fastened together with a vehicle front seat. The resonance volume is limited to the rear side by the vehicle floor. Although is also provided the vehicle floor to increase the resonance volume lower. For effective Tefton speakers, especially a sub-woofer However, the resonance volume not sufficient. Come in addition the problem of interference. Since both the speaker and the resonance volume have directed into the vehicle interior sound outlet opening, there is a sound cancellation due to interference. This is more significantly affects the effectiveness of such a loudspeaker.

0003The invention is based on the object, an arrangement of the aforementioned to create the kind in which a structurally simple manner an effective arrangement a bass speaker is reached under a vehicle seat.

0004The invention solves this problem by the features of claim 1.

0005Unlike the publication mentioned now is the resonance volume not more acoustically connected to the vehicle interior. This fall Interference phenomena completely gone. In addition, the effective volume is only limited by the volume of the support frame. This can, for example, also be designed in view of the effective sound reproduction such that the Resonance volume is sufficient. It is then without additional measures acoustic possible to arrange a bass loudspeaker acoustically effective.

0006The acoustic connection between the sill and the volume backcourt the speaker can be made without any partition. In contrast, is acoustically effective, this provide a passage. Thereby is it also possible to optimize the bass reproduction. simultaneously maintaining the strength of the supporting frame.

0007A further improvement of the invention, the sill volume to connect via diffusion openings with the environment. This is the resonance volume formed by the rear space of the speaker, the volume rocker and the adjoining environment volume. Since this rule is not limited, therefore the resonance volume can be any size and optimum acoustic effect of the bass loudspeaker at low frequencies be achieved.

0008At the same time, by the votes of diffusion openings usually sufficient Protection of the speaker and his rear compartment from the ingress of Moisture can be achieved.

0009Reference to the drawing, the invention is further explained. The sole FIG. the inventive arrangement of a bass loudspeaker (1) under a Vehicle seat.

0010A vehicle seat is indicated by its supporting rail 2, the support rail 2 is mounted on the base plate. 3 Further, a longitudinal to the longitudinal axis Support frame 4 is shown, which at regular intervals of about 20 cm diffuse openings 5 ​​Area has out.

0011The loudspeaker 1 is composed essentially of a membrane 6 with a Diameter of 200 mm, which is moved by a drive, not shown and an area covered by a fleece 7 Sound outlet face 8 with sound low frequencies of 50 to 300 Hz to write into the interior of the vehicle. 9

0012The resonance volume of the loudspeaker 1 is formed from the back 10 the speaker 1 in which there is also the drive, and the volume 11 (Hereinafter called sill volume), which is limited by the supporting frame 4 is and further through the via opening 5 acoustically connected external volume surroundings. especially since the external volume is unlimited, can so that the speakers work with a non-limited resonant volume. At the same time a sound radiation only via the sound outlet opening 8 in the interior 9 of the vehicle, since in addition between the loudspeakers 1 and the supporting frame 4, a high frequency sound insulation 12 is provided. Thereby is an acoustic coupling of the support frame 4 to the speaker 1, ie prevented an excitation of the support frame 4 by the drive.

0013there is an intermediate space 10 to the rear and the rocker volume 11 Through opening 13, which is on the one hand sufficiently large for an unhindered Sound transmission to ensure in the sill volume 11 and the other part is sufficiently small sized to the mechanical stability of Supporting frame 4 not to interfere.

0014Since via the openings 5, for example, at a water crossing in moisture the sill volume 11 and thus can pass in the backcourt is 10, the Drive the speaker and the membrane 6 watertight (not shown).

0015The arrangement of the speaker 1 can, as known per se, under the front seats be made. However, it is also possible for this purpose to the backseat use. In any case, the acoustic effect of the loudspeaker is optimal because the resonance volume is practically unlimited and a sound radiation only via the membrane 6 towards the interior, while the rear space 10 and the sill volume 11 only radiate to the environment sound. Thereby Interference phenomena are avoided. Since the opening 5 is made small, is a coupling of high-frequency ambient noise in the volumes 10 and 11 largely suppressed.