JPS5569064A - Testing method for pulsating noise - Google Patents
Testing method for pulsating noiseInfo
- Publication number
- JPS5569064A JPS5569064A JP14444878A JP14444878A JPS5569064A JP S5569064 A JPS5569064 A JP S5569064A JP 14444878 A JP14444878 A JP 14444878A JP 14444878 A JP14444878 A JP 14444878A JP S5569064 A JPS5569064 A JP S5569064A
- Authority
- JP
- Japan
- Prior art keywords
- threshold level
- pulsating
- reference time
- instantaneous value
- decision
- 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
Abstract
PURPOSE: To make a decision close to the sense of hearing by regarding a tested apparatus as a defective when the instantaneous value of an output noise exceeds a threshold level continuously for a fixed time and when it is outputted more than fixed times within a reference time.
CONSTITUTION: The instantaneous value of an output noise from an audio amplifier is denoted vN(t), a smaller value between positive and negative side mean values -vN, and a threshold level for a decision that the output noise is pulsating one k(-vN). When instantaneous value vN(t) exceeds continuously threshold level k(-vN) for reference time τp or longer and when pulsating noises are outputted more than fixed times within reference time Tp from appearance of a 1st pulsating noise, it is decided that a tested apparatus is defective. Here, not only the number of times that noises exceed the threshold level but also their pulse widths are taken into consideration, so that a decision close to the sense of hearing can be made.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53144448A JPS5855457B2 (en) | 1978-11-20 | 1978-11-20 | Pulsed noise test method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53144448A JPS5855457B2 (en) | 1978-11-20 | 1978-11-20 | Pulsed noise test method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5569064A true JPS5569064A (en) | 1980-05-24 |
JPS5855457B2 JPS5855457B2 (en) | 1983-12-09 |
Family
ID=15362460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53144448A Expired JPS5855457B2 (en) | 1978-11-20 | 1978-11-20 | Pulsed noise test method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5855457B2 (en) |
-
1978
- 1978-11-20 JP JP53144448A patent/JPS5855457B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5855457B2 (en) | 1983-12-09 |
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