A stochastic evaluation for non-stationary random noise over a long time period based on local statinarity and its application to actual acoustics environment
A non-stationary environmental noise fluctuations can be treated as some composition of local state strips having arbitrary fluctuating pattern in a locally stationary time period. Its non-stationary characteristics can be seen in the form of its changing stage from a locally stationa...
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| Format: | Article |
| Language: | English |
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Institute of Fundamental Technological Research Polish Academy of Sciences
2002-01-01
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| Series: | Archives of Acoustics |
| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/425 |
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| author | K. Nashimura M. Ohta |
| author_facet | K. Nashimura M. Ohta |
| author_sort | K. Nashimura |
| collection | DOAJ |
| description | A non-stationary environmental noise fluctuations can be
treated as some composition of local state strips having arbitrary fluctuating
pattern in a locally stationary time period. Its non-stationary characteristics
can be seen in the form of its changing stage from a locally stationary state to
another one by means of its temporal change of probability distribution. For a
non-stationarity with continuously slow temporal change, the noise evaluation
method is derived by considering the temporal change of moment statistics or
distribution parameters. On the other hand, for a non-stationarity with stepwise
rapid variation like an ON/OFF operation of machine, the noise evaluation method
is derived by considering in principle the occurring probability of each of
locally stationary state based on the mutually exclusive property. In the
experimental consideration, the above contrastive two evaluation methods have
been applied to actual cases with slowly changing environmental noise and
rapidly changing machine noise. |
| format | Article |
| id | doaj-art-b2ae38b78c6446d4ab70a121ecc83289 |
| institution | Kabale University |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2002-01-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-b2ae38b78c6446d4ab70a121ecc832892025-08-20T03:50:48ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2002-01-01273A stochastic evaluation for non-stationary random noise over a long time period based on local statinarity and its application to actual acoustics environmentK. Nashimura0M. Ohta1Faculty of Engineering, Kinki UniversityThe Emeritus Professor of Hiroshima UniversityA non-stationary environmental noise fluctuations can be treated as some composition of local state strips having arbitrary fluctuating pattern in a locally stationary time period. Its non-stationary characteristics can be seen in the form of its changing stage from a locally stationary state to another one by means of its temporal change of probability distribution. For a non-stationarity with continuously slow temporal change, the noise evaluation method is derived by considering the temporal change of moment statistics or distribution parameters. On the other hand, for a non-stationarity with stepwise rapid variation like an ON/OFF operation of machine, the noise evaluation method is derived by considering in principle the occurring probability of each of locally stationary state based on the mutually exclusive property. In the experimental consideration, the above contrastive two evaluation methods have been applied to actual cases with slowly changing environmental noise and rapidly changing machine noise. https://acoustics.ippt.pan.pl/index.php/aa/article/view/425 |
| spellingShingle | K. Nashimura M. Ohta A stochastic evaluation for non-stationary random noise over a long time period based on local statinarity and its application to actual acoustics environment Archives of Acoustics |
| title | A stochastic evaluation for non-stationary random noise over a long time
period based on local statinarity and its application to actual acoustics
environment |
| title_full | A stochastic evaluation for non-stationary random noise over a long time
period based on local statinarity and its application to actual acoustics
environment |
| title_fullStr | A stochastic evaluation for non-stationary random noise over a long time
period based on local statinarity and its application to actual acoustics
environment |
| title_full_unstemmed | A stochastic evaluation for non-stationary random noise over a long time
period based on local statinarity and its application to actual acoustics
environment |
| title_short | A stochastic evaluation for non-stationary random noise over a long time
period based on local statinarity and its application to actual acoustics
environment |
| title_sort | stochastic evaluation for non stationary random noise over a long time period based on local statinarity and its application to actual acoustics environment |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/425 |
| work_keys_str_mv | AT knashimura astochasticevaluationfornonstationaryrandomnoiseoveralongtimeperiodbasedonlocalstatinarityanditsapplicationtoactualacousticsenvironment AT mohta astochasticevaluationfornonstationaryrandomnoiseoveralongtimeperiodbasedonlocalstatinarityanditsapplicationtoactualacousticsenvironment AT knashimura stochasticevaluationfornonstationaryrandomnoiseoveralongtimeperiodbasedonlocalstatinarityanditsapplicationtoactualacousticsenvironment AT mohta stochasticevaluationfornonstationaryrandomnoiseoveralongtimeperiodbasedonlocalstatinarityanditsapplicationtoactualacousticsenvironment |