@inproceedings{e22ee495828042c189cab4bedb5a92a9,
title = "Effect of Sampling Length on Variation of SPL and Its Effects at Low Frequency",
abstract = "Onboard processed flight acoustic data shows large unphysical oscillations in low frequency (5-10 dB oscillations at 50 Hz).Such large oscillations at low frequency are also seen in data obtained from unsteady pressure / acoustic measurements carried out during wind tunnel and static motor firing tests. Our analysis shows that this feature is also seen in synthetically generated random signals. Variation of SPL oscillations with length of time signal (used for processing) has been studied for all the above-mentioned cases. Two common observations have been seen from our analyses. For a given sample length, variation of SPL with time decreases as frequency increases. For a given frequency, variation of SPL with time decreases as sample length increases. It is further noticed that this is a universal feature obtained by processing any signal and can be avoided only by increasing the sample length of the data.",
keywords = "Mach sweep test, Power spectral Density (PSD), Sound Pressure Levels (SPL), low frequency, oscillations, sample length, static motor firing test",
author = "Harsh Prateek and Subrahmanyam, \{B. V.\} and Saha, \{Sanjoy Kumar\} and Patil, \{M. M.\} and V. Ashok",
note = "Publisher Copyright: {\textcopyright} 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.; 48th National Conference on Fluid Mechanics and Fluid Power, FMFP 2021 ; Conference date: 27-12-2021 Through 29-12-2021",
year = "2023",
doi = "10.1007/978-981-19-7055-9\_74",
language = "English",
isbn = "9789811970542",
series = "Lecture Notes in Mechanical Engineering",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "441--446",
editor = "Suvanjan Bhattacharyya and Himadri Chattopadhyay",
booktitle = "Fluid Mechanics and Fluid Power - Select Proceedings of FMFP 2021",
address = "Germany",
}