{"title":"Fidelity of infrasound measurements with balloon-borne sensorsa).","authors":"Oleg A Godin","doi":"10.1121/10.0034562","DOIUrl":null,"url":null,"abstract":"<p><p>Deploying acoustic sensors on free-flying, long-living balloons helps to reach the areas not accessible with the traditional ground-based sensors, reduce flow noise, and improve characterization of various infrasound sources. Instrumented balloons can potentially increase the infrasonic detection range and early warning lead time for natural hazards. Balloons are also considered as platforms for planetary exploration. When assessing the capabilities of balloon-borne infrasonic sensors and interpreting the measurements, it is imperative to recognize that the balloon inevitably distorts the signals and background infrasound field by scattering the incoming sound. This paper quantifies the effects of hot-air and helium balloons on acoustic pressure and particle acceleration and the role of balloon skin in infrasound diffraction. It is found that balloon-borne vector sensors are more susceptible to distortions than pressure sensors, leading to major differences between the apparent and true source bearing and directionality.</p>","PeriodicalId":17168,"journal":{"name":"Journal of the Acoustical Society of America","volume":"156 6","pages":"3909-3920"},"PeriodicalIF":2.1000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Acoustical Society of America","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1121/10.0034562","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ACOUSTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Deploying acoustic sensors on free-flying, long-living balloons helps to reach the areas not accessible with the traditional ground-based sensors, reduce flow noise, and improve characterization of various infrasound sources. Instrumented balloons can potentially increase the infrasonic detection range and early warning lead time for natural hazards. Balloons are also considered as platforms for planetary exploration. When assessing the capabilities of balloon-borne infrasonic sensors and interpreting the measurements, it is imperative to recognize that the balloon inevitably distorts the signals and background infrasound field by scattering the incoming sound. This paper quantifies the effects of hot-air and helium balloons on acoustic pressure and particle acceleration and the role of balloon skin in infrasound diffraction. It is found that balloon-borne vector sensors are more susceptible to distortions than pressure sensors, leading to major differences between the apparent and true source bearing and directionality.
期刊介绍:
Since 1929 The Journal of the Acoustical Society of America has been the leading source of theoretical and experimental research results in the broad interdisciplinary study of sound. Subject coverage includes: linear and nonlinear acoustics; aeroacoustics, underwater sound and acoustical oceanography; ultrasonics and quantum acoustics; architectural and structural acoustics and vibration; speech, music and noise; psychology and physiology of hearing; engineering acoustics, transduction; bioacoustics, animal bioacoustics.