| Noise Attenuation Performance of the Joint Service Aircrew Mask (JSAM) - Joint Strike Fighter (JSF) with the Lightning II Generation II Helmet |
Apr 2012 |
18 pages |
| Authors:
Hilary L Gallagher; Richard L McKinley; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN PERFORMANCE WING (711TH) WARFIGHTER INTERFACE DIVISION/BATTLESPACE ACOUSTICS BRANCH
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 | Noise attenuation performance tests were performed on the Joint Service Aircrew Mask (JSAM)-Joint Strike Fighter (JSF) with the Lightning II Generation II (Gen II) Helmet Mounted Display (HMD) at the Air Force Research Laboratory?s (AFRL) Acoustics facilities at Wright-Patterson Air Force Base March 2012. American National Standards Institute (ANSI) methods ANSI S12.6 and S12.42 were used to measure the passive attenuation and active insertion loss performance respectively. The objective of ... |
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| Noise Attenuation Performance of the Joint Service Aircrew Mask (JSAM) Type 1 (MPU-5) Rotor Wing (RW) with Flight Helmets |
Jan 2011 |
19 pages |
| Authors:
Hilary L Gallagher; Richard L McKinley; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN PERFORMANCE WING (711TH) HUMAN EFFECTIVENESS DIRECTORATE/WARFIGHTER INTERFACE DIVISION
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| Noise attenuation performance tests were performed on the Joint Service Aircrew Mask (JSAM) Type I (MPU-5) Rotor Wing (RW) with the HGU-56/P and HGU-84/P helmets at the Air Force Research Laboratory's (AFRL) Acoustics facilities at Wright-Patterson Air Force Base September 2009. The MPU-5 was tested and compared to legacy masks (M-45, AERP, and AR-5). An American National Standards Institute (ANSI) method ANSI S- 12.42-1995(R2004) was used to measure the passive ... |
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| Auditory and Acoustic Research & Development at Air Force Research Laboratory (AFRL) |
Sep 2010 |
22 pages |
| Authors:
Richard L McKinley; BALL AEROSPACE AND TECHNOLOGIES CORP FAIRBORN OH
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| The applied research program focuses on developing innovative technologies and procedures and transitioning them to field use. Frequently these products have application not only for Air Force use, but also for use by the Army, Navy, Marine Corps, and civilian sectors. Some examples of recent in-house and contract-developed technologies include the Attenuating Custom Communication Earpiece System (ACCES), high performance active noise reduction earplugs, helmets specifically designed to reduce bone conducted ... |
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| Bone Conducted Noise and Mitigation Techniques |
Mar-2009 |
20 pages |
| Authors:
Richard L McKinley; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
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| Very high level noises, up to 150 dB, can cause special problems in hearing protection. In order to achieve a 15 minute exposure within an 85 dB, 8 hour, 3 dB/doubling criteria, the hearing protector must provide 50 dB of overall noise attenuation. The issue becomes the flanking pathway provided by bone conduction with an attenuation at 2 kHz of approximately 40-45 dB. In this case, the flanking pathway becomes ... |
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| Military Speech Communications over Vocoders in Tandem |
01 Apr 2005 |
9 pages |
| Authors:
Mark A Ericson; Brian D Simpson; Richard L McKinley; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| Speech intelligibility of two types of vocoders was measured using the modified rhyme test. One type of vocoder, a continuous variable slope delta (CVSD), was a waveform encoder. The other type, an advanced multi-band excitation (AMBE), was a parametric encoder. In the first experiment, clear speech was processed through the vocoders. Intelligibility was measured in a control condition, i.e. without vocoding, with each type alone and with two vocoders in ... |
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