JPS5555224A - Device for measuring acoustic characteristic - Google Patents
Device for measuring acoustic characteristicInfo
- Publication number
- JPS5555224A JPS5555224A JP12795678A JP12795678A JPS5555224A JP S5555224 A JPS5555224 A JP S5555224A JP 12795678 A JP12795678 A JP 12795678A JP 12795678 A JP12795678 A JP 12795678A JP S5555224 A JPS5555224 A JP S5555224A
- Authority
- JP
- Japan
- Prior art keywords
- data
- ram
- signal
- room
- storage place
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To automate the pigeonholing and calculation of measured data and remove errors from the data, by providing a plurality of storage regions in an RAM for storing the data.
CONSTITUTION: A tone burst signal is sequentially read from an ROM 4 and applied to a loudspeaker 2 placed in a room 1. The sound signal of the loudspeaker is caught by a microphone 3 to obtain a signal. This signal is envelope-detected by a circuit comprising a peak detection circuit 8, a variable gain amplifier 9, multiplication-type D-A converters 11a, 11b, LPF's 12a, 12b, squaring units 13a, 13b and an adder 14, thereby obtaining the reverberation curve of the room 1. Measured data at each measured frequency are temporarily stored at a first storage place of an RAM 24. Wherever m times of measurement at one place in the room 1 are finished, the measured data are transferred to a second storage place of the RAM 24 and summed up and the data at the first storage place are erased.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12795678A JPS5555224A (en) | 1978-10-18 | 1978-10-18 | Device for measuring acoustic characteristic |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12795678A JPS5555224A (en) | 1978-10-18 | 1978-10-18 | Device for measuring acoustic characteristic |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5555224A true JPS5555224A (en) | 1980-04-23 |
Family
ID=14972804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12795678A Pending JPS5555224A (en) | 1978-10-18 | 1978-10-18 | Device for measuring acoustic characteristic |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5555224A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6288926A (en) * | 1985-10-16 | 1987-04-23 | Shimizu Constr Co Ltd | Reverberation measuring instrument |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52119968A (en) * | 1976-03-31 | 1977-10-07 | Sony Corp | Reverberation curve measuring apparatus |
JPS52119970A (en) * | 1976-03-31 | 1977-10-07 | Sony Corp | Sound measuring apparatus |
-
1978
- 1978-10-18 JP JP12795678A patent/JPS5555224A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52119968A (en) * | 1976-03-31 | 1977-10-07 | Sony Corp | Reverberation curve measuring apparatus |
JPS52119970A (en) * | 1976-03-31 | 1977-10-07 | Sony Corp | Sound measuring apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6288926A (en) * | 1985-10-16 | 1987-04-23 | Shimizu Constr Co Ltd | Reverberation measuring instrument |
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