| Speech Understanding in Noise in the Bison Command, Control, Communications and Intelligence (C3I) Mobile Command Post (MCP) |
Dec 2010 |
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| Authors:
Sharon M Abel; Ann Nakashima; Ingrid Smith; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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 | This experiment compared subjects' ability to understand a series of messages presented either over a pair of loudspeakers or a headset used in the Bison Command, Control, Communications and Intelligence (C3I) mobile command post (MCP). The messages were presented in quiet or in a background of noise heard in a light armoured vehicle driving along a highway, speech babble noise or both, at signal-to-noise ratios that were close to zero. ... |
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| Overview of Tactical Communication Headsets |
Jan 2010 |
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| Authors:
Ann Nakashima; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| This report presents an overview of various in-ear hearing protection and communication systems that are designed for use by the dismounted soldier. Integrated hearing protection headsets (IHPH) offer advanced features such as active noise reduction (ANR) and enhanced hearing capability. However, the electronics that are required to provide such features are challenged in adverse environmental conditions, such as extreme cold. Nonlinear earplugs provide protection from high-level noise while allowing lower-level ... |
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| Effects of Integrated Hearing Protection Headsets on the Quality of Radio Communications (Effets des Casques D'ecoute Munis d'un Dispositif Integre de Protection de L'Ouie sur la Qualite des Communications Radio) |
Jul 2009 |
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| Authors:
Ann Nakashima; Sharon M Abel; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| The speech intelligibility of a personal role radio (PRR) with integrated hearing protection headsets (IHPH) was investigated. The standard PRR communication headset is comprised of a one-sided earcup and a boom microphone, and does not provide hearing protection. IHPH devices provide simultaneous hearing protection, communication and enhanced hearing capability. Two different tests of speech intelligibility were used (modified rhyme test [MRT] and speech perception in noise [SPIN]) to evaluate the ... |
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| Impulse Noise: Measurement Techniques and Hearing Protector Performance. Report on Scientific Exchange at the French-German Research Institute of Saint-Louis |
OCT 2006 |
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| Authors:
Ann Nakashima; Karl Buck; Pascal Hamery; Sebastien De Mezzo; Gilbert Brom; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| Measurements of impulse noise and the performance of several hearing protection devices were done in Saint-Louis and Baldersheim, France at the French-German Research Institute of Saint- Louis (ISL) in August 2006. Hearing protector performance was evaluated using an acoustic test fixture that was designed by ISL. Impulse noises of peak levels from 110 to 190 dB were produced by detonation of explosives. The noise attenuation achieved by a Peltor communications ... |
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| A Review on the Effects of Frequency of Oscillation on Motion Sickness |
OCT 2006 |
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| Authors:
Bob Cheung; Ann Nakashima; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| In support of the ADVANCE TDP (Advanced Vehicle Architecture for a Net-Enabled Combat Environment Technology Demonstration Project), and at the request of Director Armoured Vehicles Program Management (DAVPM), we undertook to provide a Phase I assessment on the effects of motion disturbance on the performance of operators based on a theoretical and comprehensive literature review. A comprehensive review on the effects of motion disturbance on human behaviour and well-being in ... |
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| The Effects of Vibration Frequencies on Physical, Perceptual and Cognitive Performance |
OCT 2006 |
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| Authors:
Ann Nakashima; Bob Cheung; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| In the study of crewmember performance in land-driven vehicles, it is necessary to consider the effects of vibration on the human body. The Advanced Vehicle Architecture for a Net enabled Combat Environment Technology Demonstrator Project (ADVANCE TDP) aims to demonstrate improved crew performance using an integrated multi-layered vectronics network, supported by an active suspension system that stabilizes the vehicle platform. This review discusses the effects of different frequencies and magnitudes ... |
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| An investigation of the Attenuation Provided by the Surefire EP3 Sonic Defender (Trademark) Earplug |
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| Authors:
Ann Nakashima; Sharon M Abel; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| The sound attenuation provided by the Surefire EP3 Sonic Defender(TM) earplug was determined in five males and five females. According to the manufacturer, an orifice in the plug allows safe sound levels to pass while lowering potentially harmful levels above 80 dBA from impulse noise by 35 dB. With the orifice closed the device performs like a conventional level-independent earplug. In each subject, hearing thresholds were measured at nine one-third ... |
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