JPH0236288U

JPH0236288U -

Info

Publication number: JPH0236288U
Application number: JP11503688U
Authority: JP
Priority date: 1988-09-02
Filing date: 1988-09-02
Publication date: 1990-03-08

Description

[Brief explanation of drawings]

第１図は、この考案の一実施例に係る音響装置
の構成説明図、第２図は、第１図の音響装置から
放射される音響の音圧の周波数特性図、第３図は
、第１図の音響装置における空気流のふるまいを
示す説明図、第４図は、この考案の他の実施例に
係る音響装置の構成説明図、第５図は、従来のバ
スレフ形スピーカシステムの構成を示す斜視図お
よび断面図、第６図は、第７図のスピーカシステ
ムの音圧特性の説明図、そして、第７図は、この
考案の先願に係る共鳴ポート付スピーカシステム
の構成説明図である。１：キヤビネツト（スピーカエンクロージヤ）
、１ａ：キヤビネツトの表側壁面、１ｂ：キヤビ
ネツトの後側壁面、１ｃ：キヤビネツトの内部空
間（空洞）、２：振動板、４：振動器（スピーカ
ユニツト）、６：共鳴ポート（開口管ポート）、
６ａ：共鳴ポートの開口端、６ｂ：共鳴ポートの
開口端（自由端側開口端）、８：バフル部材、３
０：振動器駆動装置、３１：サーボ部。 FIG. 1 is an explanatory diagram of the configuration of an acoustic device according to an embodiment of the invention, FIG. 2 is a frequency characteristic diagram of the sound pressure of the sound emitted from the acoustic device of FIG. 1, and FIG. FIG. 1 is an explanatory diagram showing the behavior of airflow in the acoustic device, FIG. 4 is an explanatory diagram of the configuration of an audio device according to another embodiment of this invention, and FIG. 5 is an explanatory diagram showing the configuration of a conventional bass reflex speaker system. 6 is an explanatory diagram of the sound pressure characteristics of the speaker system of FIG. 7, and FIG. 7 is an explanatory diagram of the configuration of the speaker system with a resonance port according to the earlier application of this invention. be. 1: Cabinet (speaker enclosure)
, 1a: front wall surface of the cabinet, 1b: rear wall surface of the cabinet, 1c: internal space (cavity) of the cabinet, 2: diaphragm, 4: vibrator (speaker unit), 6: resonance port (open pipe port),
6a: Open end of resonance port, 6b: Open end of resonance port (open end on free end side), 8: Baffle member, 3
0: Vibrator drive device, 31: Servo section.

Claims

[Claims for Utility Model Registration] (1) An acoustic device in which a vibrator is arranged in a Helmholtz resonator having a cabinet forming a closed cavity and an open tube port connecting the cavity to an area outside the cabinet. In the apparatus, each of the open ends of the open pipe port is attached to a wall surface of the cabinet so that a baffle structure is formed that prevents airflow flowing in and out of the open end from turning around by more than a predetermined angle, or
Or an acoustic device characterized by being equipped with a baffle member. (2) The acoustic device according to claim 1, wherein the vibrator is driven with electrical servo so as to cancel out an atmospheric reaction from the resonator side when the resonator is driven.