{"title":"用于测量多孔材料声学特性的三传声器和四传声器方法的误差比较","authors":"R. Muehleisen, C. Beamer","doi":"10.1121/1.1498175","DOIUrl":null,"url":null,"abstract":"The three-microphone and four-microphone methods have been shown useful for measuring the characteristic impedance and propagating wavenumber of porous materials. In this paper the effects of uncertainties in the apparatus and pressure transfer function measurements are analyzed using Monte Carlo methods. It is shown that for materials with low flow resistivities the four-microphone method is appreciably more accurate than the three-microphone method at low frequencies. The dominant contributors to the overall error are uncertainty in the magnitude and phase of the transfer function measurement.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2002-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"15","resultStr":"{\"title\":\"Comparison of errors in the three- and four-microphone methods used in the measurement of the acoustic properties of porous materials\",\"authors\":\"R. Muehleisen, C. Beamer\",\"doi\":\"10.1121/1.1498175\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The three-microphone and four-microphone methods have been shown useful for measuring the characteristic impedance and propagating wavenumber of porous materials. In this paper the effects of uncertainties in the apparatus and pressure transfer function measurements are analyzed using Monte Carlo methods. It is shown that for materials with low flow resistivities the four-microphone method is appreciably more accurate than the three-microphone method at low frequencies. The dominant contributors to the overall error are uncertainty in the magnitude and phase of the transfer function measurement.\",\"PeriodicalId\":87384,\"journal\":{\"name\":\"Acoustics research letters online : ARLO\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-06-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"15\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acoustics research letters online : ARLO\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1121/1.1498175\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acoustics research letters online : ARLO","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1121/1.1498175","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Comparison of errors in the three- and four-microphone methods used in the measurement of the acoustic properties of porous materials
The three-microphone and four-microphone methods have been shown useful for measuring the characteristic impedance and propagating wavenumber of porous materials. In this paper the effects of uncertainties in the apparatus and pressure transfer function measurements are analyzed using Monte Carlo methods. It is shown that for materials with low flow resistivities the four-microphone method is appreciably more accurate than the three-microphone method at low frequencies. The dominant contributors to the overall error are uncertainty in the magnitude and phase of the transfer function measurement.