JPS5555226A - Method of automatically identifying sound source - Google Patents
Method of automatically identifying sound sourceInfo
- Publication number
- JPS5555226A JPS5555226A JP12803678A JP12803678A JPS5555226A JP S5555226 A JPS5555226 A JP S5555226A JP 12803678 A JP12803678 A JP 12803678A JP 12803678 A JP12803678 A JP 12803678A JP S5555226 A JPS5555226 A JP S5555226A
- Authority
- JP
- Japan
- Prior art keywords
- noises
- microphones
- airplane
- circuit
- output
- 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.)
- Granted
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To raise the sureness of identification of a moving noise source such as an airplane and reduce labor, by detecting the difference in the effect of interference of direct noises from the moving sound source with reflected noises.
CONSTITUTION: When noises goes from a distant airplane to microphones 1, 1' placed at a prescribed altidude on the ground, the output levels of both the microphones are almost equal to each other and a level difference detection circuit 3 generates no output. When the airplane approaches the microphones, their output levels differ from each other due to the interference of direct waves of the noises with their reflected ones and the output of the circuit 3 increases or decreases. At that time, the times of operation of comparators 4, 4' are measured at 5, 5' and the time of continuation of the measurement is also measured at 6, 6'. The measured values are applied to a discrimination circuit 7. When a prescribed condition is satisfied, an instruction circuit 9 is started to pick out the maintained level of the reference microphone 1 as a datum.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12803678A JPS5555226A (en) | 1978-10-18 | 1978-10-18 | Method of automatically identifying sound source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12803678A JPS5555226A (en) | 1978-10-18 | 1978-10-18 | Method of automatically identifying sound source |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5555226A true JPS5555226A (en) | 1980-04-23 |
JPH023126B2 JPH023126B2 (en) | 1990-01-22 |
Family
ID=14974920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12803678A Granted JPS5555226A (en) | 1978-10-18 | 1978-10-18 | Method of automatically identifying sound source |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5555226A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009180738A (en) * | 2009-04-27 | 2009-08-13 | Nittobo Acoustic Engineering Co Ltd | Aircraft noise data analyzing and processing method |
CN103089589A (en) * | 2013-01-09 | 2013-05-08 | 昆山佳铭自动化科技有限公司 | Compressing-ring assembling and detection combination device used for piston type electric vacuum pump |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5016726B1 (en) * | 2011-09-02 | 2012-09-05 | リオン株式会社 | Noise observation apparatus and noise observation method |
-
1978
- 1978-10-18 JP JP12803678A patent/JPS5555226A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009180738A (en) * | 2009-04-27 | 2009-08-13 | Nittobo Acoustic Engineering Co Ltd | Aircraft noise data analyzing and processing method |
CN103089589A (en) * | 2013-01-09 | 2013-05-08 | 昆山佳铭自动化科技有限公司 | Compressing-ring assembling and detection combination device used for piston type electric vacuum pump |
Also Published As
Publication number | Publication date |
---|---|
JPH023126B2 (en) | 1990-01-22 |
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