Assessment of the Applicability of ANSI S12.42-2010 as a General Measure of Protection from Impulsive Noise by Measurement of Impulsive and Continuous Noise Insertion Loss of the HGU-56/P and the CEP

Williams, Robert

doi:10.21236/ada565533

Cited by 1 publication

(1 citation statement)

References 14 publications

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“…In the case of operating aircraft, HPs are a necessity making the evaluation of HPs part of the problem to be analyzed. In fact, much research has been completed and is still being done on the performance of HPs (including the extensively used HGU-56/P helmet [6], [7] and [8]). This research is often initiated due to complaints from aircrew about excessive noise.…”

Section: Hearing Conservation Risksmentioning

confidence: 99%

Data Acquisition System Design and Validation to Record Interior Cabin Noise Levels of Aircraft

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Aircraft crew members and maintenance personnel are subject to significantly high sound pressure levels. Cumulative exposure to such high levels could induce hearing loss. Therefore, choosing the optimal hearing protector is of the utmost importance.The equipment used to measure the sound levels in the aircraft cabin for helmet selection must be subjected to airworthiness regulations to be flown. This thesis documents the selection, implementation and validation of an in-flight data acquisition system. The signal route is characterized with digital signal processing theory and a comparison to LMS Test.LAB acoustic analysis software. Bell 412 in-flight data is presented to validate the measurement method. The main rotor and tail rotor harmonics were found to dominate the low frequency sound pressure levels. The analysis concluded that the SPH 5CF helmet satisfies the Canadian Labour Code Part II for in-flight occupant noise exposure limit of a maximum of 87 dBA for eight hours.iii , a rate, often used to define frequencies or sample rates

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Section: Hearing Conservation Risksmentioning

confidence: 99%

Data Acquisition System Design and Validation to Record Interior Cabin Noise Levels of Aircraft

Price¹

View full text Add to dashboard Cite

show abstract

Assessment of the Applicability of ANSI S12.42-2010 as a General Measure of Protection from Impulsive Noise by Measurement of Impulsive and Continuous Noise Insertion Loss of the HGU-56/P and the CEP

Cited by 1 publication

References 14 publications

Data Acquisition System Design and Validation to Record Interior Cabin Noise Levels of Aircraft

Data Acquisition System Design and Validation to Record Interior Cabin Noise Levels of Aircraft

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