| DOI | Resolve DOI: https://doi.org/10.1177/1045389X16667553 |
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| Author | Search for: Chen, Yong1; Search for: Ghinet, Sebastian1; Search for: Price, Andrew1; Search for: Wickramasinghe, Viresh1; Search for: Grewal, Anant1 |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Format | Text, Article |
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| Abstract | High noise levels in the helicopter cabin adversely affect aircrew communication and reduce comfort in the short-term and may lead to hearing loss in the long-term if flight helmets cannot provide sufficient protection to the aircrew. A cabin noise exposure survey has been performed on a Royal Canadian Air Force CH-147F Chinook heavy lift helicopter to evaluate the noise environment and noise protection performance of the flight helmet. Investigation results showed that the low-frequency noise attenuation provided by the Royal Canadian Air Force flight helmet was marginal in high-speed flight conditions that generate loud cabin noise. Therefore, in-canal earphone integrated with active noise cancellation capability was investigated to provide enhanced noise protection and improve clarity in voice communication. Simulation and proof-of-concept test results verified that active noise cancellation in-canal earphones can serve as a feasible technical solution to provide enhanced noise attenuation to mitigate the low-frequency N/rev tonal noise generated by the aerodynamic pressure from the helicopter rotor blades. |
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| Publication date | 2016-09-13 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23000784 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 2bea2e40-2e0e-47b1-8502-6547787ad1db |
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| Record created | 2016-09-22 |
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| Record modified | 2020-03-16 |
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