JPH0371005U

JPH0371005U -

Info

Publication number: JPH0371005U
Application number: JP13335589U
Authority: JP
Priority date: 1989-11-16
Filing date: 1989-11-16
Publication date: 1991-07-17

Description

[Brief explanation of drawings]

第１図ａ乃至ｄは本考案の吸音有孔板構造体の
一実施例に係る有孔板のスライド動による板材と
吸音材との対応関係を示す要部の各断面図、第２
図ａ乃至ｄは孔位置を仮想線で表して同様に有孔
板のスライド動による板材と吸音材との対応関係
を示す部分的な各正面図、第３図ａ及びｂは枠も
含めた有孔板構造体の一部正面図と同縦断面図、
第４図ａ乃至ｄは有孔板のスライド位置に対応し
て無孔状態から有効吸音孔の全開状態までのパタ
ーンを示す各正面図、第５図は本考案の吸音有孔
板構造体の変更実施例とともに第６図の吸音特性
を得る一例としての諸元を示す要部の断面図、第
６図は本考案の吸音有孔板構造体により得られる
一例としての周波数−吸音率特性図、第７図ａ及
びｂは従来の吸音有孔板構造を示す一部正面図と
同断面図、第８図は共鳴周波数の理論式に基づく
周波数−吸音率特性図、第９図は従来のスリツト
状開口部を有する壁板のスライド構造例を示す断
面図である。１……有孔板、１ａ……孔、２……有効吸音孔
、３，４，５，６……板材、９……裏板、１１，
１２，１３，１４……吸音材、１５……枠。 1A to 1D are cross-sectional views of main parts showing the correspondence between the plate material and the sound-absorbing material due to the sliding movement of the perforated plate according to an embodiment of the sound-absorbing perforated plate structure of the present invention;
Figures a to d are partial front views showing the hole positions using imaginary lines and similarly showing the correspondence between the plate material and the sound absorbing material due to the sliding movement of the perforated plate, and Figures 3 a and b include the frame. A partial front view and longitudinal sectional view of the perforated plate structure,
Figures 4a to 4d are front views showing patterns from a non-perforated state to a fully open state of effective sound-absorbing holes corresponding to the sliding position of the perforated plate, and Figure 5 is a diagram of the perforated sound-absorbing plate structure of the present invention. FIG. 6 is a cross-sectional view of essential parts showing specifications as an example of obtaining the sound absorption characteristics of the present invention together with modified examples. FIG. 6 is a frequency-sound absorption coefficient characteristic diagram as an example of the sound absorption perforated plate structure of the present invention. , Fig. 7 a and b are a partial front view and the same sectional view showing the conventional sound-absorbing perforated plate structure, Fig. 8 is a frequency-sound absorption coefficient characteristic diagram based on the theoretical formula of the resonant frequency, and Fig. 9 is the conventional sound-absorbing perforated plate structure. FIG. 3 is a cross-sectional view showing an example of a sliding structure of a wall plate having a slit-like opening. 1... Perforated plate, 1a... Hole, 2... Effective sound absorption hole, 3, 4, 5, 6... Board material, 9... Back plate, 11,
12, 13, 14...Sound absorbing material, 15...Frame.

Claims

[Scope of utility model registration request]

A perforated plate that can be slid along the direction of the plate surface, and a perforated plate that is arranged behind the perforated plate and that adjusts the aperture ratio of the perforated plate and the hole pitch of effective sound absorption holes in accordance with the sliding position of the perforated plate. a plate material having a variable shape; and a sound absorbing material that is continuously arranged behind the perforated plate in the direction of the plate surface of the plate material, and is located behind the effective sound absorption hole corresponding to the sliding position of the perforated plate. A sound-absorbing perforated plate structure comprising: