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1	Evaluation of Auditory Characteristics of Communications and Hearing Protection Systems (C&HPSs) Part II - Speech Intelligibility
	Henry, Paula; Weatherless, Rachel
	In: DTIC (2010)
	Abstract: Devices that provide hearing protection, situational awareness, and radio communications are often referred to as Communications and Hearing Protection Systems (C&HPSs). Soldiers use these systems while deployed to navigate within their environment, communicate with their team members, and protect their hearing. Each of the three features of select C&HPSs (hearing protection, speech communication, and situational awareness) was evaluated by the U.S. Army Research Laboratory in order to obtain data that is independent from that provided by the manufacturer. This report is the second in a series of three and focuses on the speech intelligibility performance obtained from two commercially available C&HPSs: Nacre QuietPro and Silynx QuietOps selected from three C&HPSs evaluated for attenuation characteristics in the first report. Results of the speech intelligibility testing indicated that the Silynx QuietOps provides a significantly higher degree of speech intelligibility, but this difference is probably not significant for field applications. The differences noted in speech intelligibility are likely due to a combination of differences in the frequency responses measured from the two systems and differences in the frequency responses of the microphones from the two systems, along with small differences in the output intensity of the speech items provided to the listeners. ; The original document contains color images.
	Keyword: COMMUNICATION AND RADIO SYSTEMS; COMMUNICATIONS AND HEARING PROTEIN SYSTEMS; FREQUENCY RESPONSE; HEARING; HEARING PROTECTION; SPEECH; *SPEECH INTELLIGIBILITY; Anatomy and Physiology; ARMY PERSONNEL; ARMY RESEARCH; ATTENUATION; AWARENESS; C &HPS(COMMUNICATIONS AND HEARING PROTEIN SYSTEMS); FIELD CONDITIONS; INTELLIGIBILITY; INTENSITY; MICROPHONES; OUTPUT; PE62716A; PROTECTION; Radio Communications; SITUATIONAL AWARENESS; TEAMS(PERSONNEL); TEST AND EVALUATION; VOICE COMMUNICATIONS
	URL: http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA514651 http://www.dtic.mil/docs/citations/ADA514651
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2	Listener Detection of Talker Stress in Low-Rate Coded Speech
	Voran, Stephen
	In: DTIC (2008)
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3	Comparison of Speech Intelligibility in Cockpit Noise Using SPH-4 Flight Helmet with and without Active Noise Reduction
	Chan, Jeffrey W.; Simpson, Carol A.
	In: DTIC AND NTIS (1990)
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4	The Intelligibility of Natural and Vocoded Semantically Anomalous Sentences: A Comparative Analysis of English Monolinguals and German-English Bilinguals.
	Mack, Molly; Tierney, Joseph
	In: DTIC AND NTIS (1987)
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5	Speech Intelligibility in Naval Aircraft Radios
	Webster, J. C.; Allen, C. R.
	In: DTIC AND NTIS (1972)
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6	Multiplexing of Delta Modulated Signals. Volume 1.
	Bennier, Donald J.; McKibbin, John; Wollaston, Terence C.
	In: DTIC AND NTIS (1968)
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7	INFORMATION EXTRACTION FROM VOICE COMMUNICATIONS: WORK METHODS FOR SINGLE TRANSCRIBERS.
	Stichman,Eugene P.; Renaud,George E.
	In: DTIC AND NTIS (1965)
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8	THE PRONUNCIATION OF ENGLISH AIR TRAFFIC CONTROL WORDS BY CONTROLLERS FROM TWELVE ICAO NATIONS.
	MOSER,H. M.
	In: DTIC AND NTIS (1964)
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9	THE INTELLIGIBILITY OF TWICE DETERIORATED SPEECH
	BLACK,John W.; Agnello,Joseph G.
	In: DTIC AND NTIS (1964)
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10	BIBLIOGRAPHY OF HUMAN FACTORS RESEARCH WITH ABSTRACTS, 1954 THROUGH 1962
	Gonon, J. P.
	In: DTIC AND NTIS (1963)
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11	METHODS FOR PHONEMIC RECOGNITION IN SPEECH PROCESSING
	Hollabaugh, Jon D
	In: DTIC AND NTIS (1963)
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12	THE MASKING OF SPEECH BY HIGH- AND LOW-PASS NOISE
	DYER,WILLIAM R.
	In: DTIC AND NTIS (1962)
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13	DIVISION 5. INFORMATION PROCESSING
	In: DTIC AND NTIS (1961)
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14	SPEECH ANALYSIS TECHNIQUES
	FANT, GUNNAR; RISBERG, ARNE
	In: DTIC AND NTIS (1961)
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15	SPEECH ANALYSIS TECHNIQUES
	FANT,GUNNAR; RISBERG,ARNE
	In: DTIC AND NTIS (1961)
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16	A DIGITALIZED SPEECH COMPRESSION SYSTEM
	COULTER,D.C.; EARLY,D.M.; IRONS,R.E.
	In: DTIC AND NTIS (1961)
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17	SPEECH ANALYSIS TECHNIQUES
	FANT, GUNNAR; RISBERG, ARNE
	In: DTIC AND NTIS (1960)
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