JPH0415392U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案マイクロホン装置の上面図、第
２図は管に取り付けた状態を示す断面図、第３図
はスリツト全開の時のマイクロホンの音圧周波数
特性、第４図はスリツト2/3解放時の音圧周波数
特性、第５図はスリツト1/3解放の時の音圧周波
数特性である。 図中、１はマイクロホンユニツト、１ａは筺体
、２はホルダ、３はケース、３ａは段部、３ｂは
上端面、３ｃは内壁、４は蓋、４ａ，４ｂはそれ
ぞれスライド蓋、４ｃはスリツト、５は吸音材、
６はダクトまたは管である。 Figure 1 is a top view of the microphone device of the present invention, Figure 2 is a cross-sectional view showing the state installed in a tube, Figure 3 is the sound pressure frequency characteristic of the microphone when the slit is fully open, and Figure 4 is the slit 2/3. Sound pressure frequency characteristics when opened. Figure 5 shows the sound pressure frequency characteristics when 1/3 of the slit is opened. In the figure, 1 is a microphone unit, 1a is a housing, 2 is a holder, 3 is a case, 3a is a step, 3b is an upper end surface, 3c is an inner wall, 4 is a lid, 4a and 4b are slide lids, 4c is a slit, 5 is a sound absorbing material,
6 is a duct or pipe.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 内壁３ｃに沿わせて吸音材５を配設し、上端面
３ｂを被測定管６内に開口し、マイクロホン１を
取り付けたホルダ２を固定した有底筒状のケース
３の前記の上端面３ｂに、スリツト４ｃ，４ｃを
穿設したスライド二重開閉蓋４を設けたマイクロ
ホン装置。 The upper end surface 3b of a bottomed cylindrical case 3 in which a sound absorbing material 5 is arranged along an inner wall 3c, an upper end surface 3b is opened into a tube to be measured 6, and a holder 2 to which a microphone 1 is attached is fixed. The microphone device is provided with a sliding double opening/closing lid 4 having slits 4c, 4c.