JPS6286796U

JPS6286796U -

Info

Publication number: JPS6286796U
Application number: JP17863285U
Authority: JP
Priority date: 1985-11-20
Filing date: 1985-11-20
Publication date: 1987-06-03

Description

[Brief explanation of the drawing]

第１図はこの考案のマイクロホン装置の第１の
実施例の斜視図、第２図は第１図の横断面図、第
３図はこの考案のマイクロホン装置の第２の実施
例の要部を示す斜視図、第４図ないし第６図はそ
れぞれ第１の実施例の指向特性図、第７図はこの
考案のマイクロホン装置の第３の実施例の斜視図
、第８図はこの考案のマイクロホン装置の第４の
実施例の斜視図、第９図は第８図の横断面図、第
１０図ないし第１２図はそれぞれ第４の実施例の
指向特性図、第１３図はこの考案のマイクロホン
装置の第５の実施例の要部を示す斜視図、第１４
図はこの考案のマイクロホン装置の第６の実施例
の斜視図、第１５図は従来の指向性マイクロホン
の断面図、第１６図は第１５図のマイクロホンの
指向特性図である。１Ａ……無指向性マイクロホン、１Ｂ……単一
指向性マイクロホン、２Ａ，２Ｂ……マイクロホ
ルダ、３……シヤツタ、４……キヤビネツト、５
，６……音圧疎通孔、７……スライドノブ、８…
…スリツト。 Fig. 1 is a perspective view of a first embodiment of the microphone device of this invention, Fig. 2 is a cross-sectional view of Fig. 1, and Fig. 3 shows main parts of a second embodiment of the microphone device of this invention. 4 to 6 are directional characteristics diagrams of the first embodiment, FIG. 7 is a perspective view of the third embodiment of the microphone device of this invention, and FIG. 8 is a microphone of this invention. 9 is a cross-sectional view of FIG. 8, FIGS. 10 to 12 are directional characteristic diagrams of the fourth embodiment, and FIG. 13 is a microphone of this invention. 14th perspective view showing main parts of the fifth embodiment of the device
15 is a sectional view of a conventional directional microphone, and FIG. 16 is a directional characteristic diagram of the microphone shown in FIG. 15. 1A...Omnidirectional microphone, 1B...Unidirectional microphone, 2A, 2B...Micro holder, 3...Shutter, 4...Cabinet, 5
, 6...Sound pressure communication hole, 7...Slide knob, 8...
...Slit.

Claims

[Scope of utility model registration request]

A plurality of sound pressure communication holes are formed on the front and side surfaces of the cabinet, and by sliding a shutter that is inscribed or circumscribed in the cabinet, the area of the sound pressure communication holes on the side surface is changed, and the sound pressure communication holes that are held at the rear of the side surface are changed. The directional characteristics of the sound pressure collected by the omnidirectional microphone can be continuously changed from unidirectional to omnidirectional, or A microphone device characterized by changing the frequency characteristics of rear sound pressure of a unidirectional microphone and continuously changing the directional characteristics.