JPH0178924U - - Google Patents
Info
- Publication number
- JPH0178924U JPH0178924U JP1987175474U JP17547487U JPH0178924U JP H0178924 U JPH0178924 U JP H0178924U JP 1987175474 U JP1987175474 U JP 1987175474U JP 17547487 U JP17547487 U JP 17547487U JP H0178924 U JPH0178924 U JP H0178924U
- Authority
- JP
- Japan
- Prior art keywords
- absorption coefficient
- sound absorption
- average sound
- measuring device
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
第１図は本考案の一実施例に係わる平均吸音率
測定装置を示すブロツク図、第２図は従来の平均
吸音率測定装置を示すブロツク図、第３図は従来
の平均吸音率測定装置で記録された残響音レベル
変化を示す図である。
１１……音源、１２……マイクロフオン、１３
……平均吸音率測定装置、１４……増幅器、１５
……並列型フイルタ、１６……検波回路部、１７
……対数変換回路部、１８……Ａ／Ｄ変換器、１
９……記憶回路、２０……演算機、２１……キー
ボード、２２……出力装置。
Fig. 1 is a block diagram showing an average sound absorption coefficient measuring device according to an embodiment of the present invention, Fig. 2 is a block diagram showing a conventional average sound absorption coefficient measuring device, and Fig. 3 is a block diagram showing a conventional average sound absorption coefficient measuring device. FIG. 3 is a diagram showing recorded changes in reverberant sound level. 11...Sound source, 12...Microphone, 13
... Average sound absorption coefficient measuring device, 14 ... Amplifier, 15
... Parallel filter, 16 ... Detection circuit section, 17
... Logarithmic conversion circuit section, 18 ... A/D converter, 1
9... Memory circuit, 20... Computing machine, 21... Keyboard, 22... Output device.
Claims (1)
タ、検波回路、対数変換回路、Ａ／Ｄ変換器およ
び演算機の順に入出力し、入力信号の各周波数バ
ンド毎の残響および平均吸音率をあらかじめ入力
された条件に基づいて演算出力することを特徴と
する平均吸音率測定装置。 The output of the microphone is inputted and outputted in this order to a parallel constant ratio band filter, a detection circuit, a logarithmic conversion circuit, an A/D converter, and a computer, and the reverberation and average sound absorption coefficient for each frequency band of the input signal are input in advance. An average sound absorption coefficient measuring device characterized in that it performs a calculation output based on conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175474U JPH0178924U (en) | 1987-11-17 | 1987-11-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175474U JPH0178924U (en) | 1987-11-17 | 1987-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0178924U true JPH0178924U (en) | 1989-05-26 |
Family
ID=31467265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987175474U Pending JPH0178924U (en) | 1987-11-17 | 1987-11-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0178924U (en) |
-
1987
- 1987-11-17 JP JP1987175474U patent/JPH0178924U/ja active Pending
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