JPH0247894U

JPH0247894U -

Info

Publication number: JPH0247894U
Application number: JP12563188U
Authority: JP
Priority date: 1988-09-28
Filing date: 1988-09-28
Publication date: 1990-04-03

Description

[Brief explanation of drawings]

第１図は、この考案の実施例の音響装置の基本
構成の説明図、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ａ
，ｂは、第１の実施例の斜視図および要部拡大断
面図、第４図ａ，ｂは、第２の実施例の斜視図お
よび要部拡大断面図、第５図は、第３の実施例の
要部断面図、第６図は、第４の実施例の要部断面
図、第７図ａ，ｂ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８
図は、第７図のスピーカシステムの音圧特性の説
明図、第９図は、本出願人の先願に係る音響装置
の基本構成図、そして第１０図ａ，ｂ，ｃは、そ
れぞれ従来の音響装置の開口管ポートとキヤビネ
ツトとの取付構成を示す断面図である。１：キヤビネツト、４：振動器、６：開口管ポ
ート（開口管ポート組立体）、３０：振動器駆動
装置、３１：サーボ部、６１：内筒（開口管ポー
ト本体）、６２：外筒（粘弾性体）、６８：装飾
用取付部材（粘弾性体）。 Fig. 1 is an explanatory diagram of the basic configuration of the acoustic device according to the embodiment of this 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. 3 a
, b are a perspective view and an enlarged sectional view of the main part of the first embodiment, FIGS. 4a and b are a perspective view and an enlarged sectional view of the main part of the second embodiment, and FIG. FIG. 6 is a cross-sectional view of the main part of the fourth embodiment; FIGS. 7a and b are perspective views and cross-sectional views showing the configuration of a conventional bass reflex speaker system;
The figures are an explanatory diagram of the sound pressure characteristics of the speaker system in Fig. 7, Fig. 9 is a basic configuration diagram of the acoustic device according to the applicant's earlier application, and Figs. 10 a, b, and c are respectively conventional FIG. 3 is a cross-sectional view showing the mounting structure of the open pipe port and the cabinet of the acoustic device. 1: Cabinet, 4: Vibrator, 6: Open pipe port (open pipe port assembly), 30: Vibrator drive device, 31: Servo part, 61: Inner cylinder (open pipe port body), 62: Outer cylinder ( Viscoelastic body), 68: Decorative mounting member (viscoelastic body).

Claims

[Claims for Utility Model Registration] (1) A vibrator is disposed in a Helmholtz resonator having a cavity and an open pipe port that connects the cavity to an external area, and resonant sound is emitted by driving the vibrator. In the acoustic device, a viscoelastic body is interposed between the opening tube port and the cavity. (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.