rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Comparison of acoustic properties of two USMC helmets
  name:
    name part: Henry, Paula Patricia.
    role:
      role term: creator
  name:
    name part: Faughn, Jim A.
  name:
    name part: Mermagen, Timothy J.
  name:
    name part: U.S. Army Research Laboratory
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: mdu
    date issued: 2008
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource (iv, 20 pages) : illustrations (some color).
  abstract: The United States Marine Corps (USMC) has recently replaced an older Combat Vehicle Crewman (CVC) communications headset (the MK1697/G) with a newer version (Enhanced CVC headset [ECVCH]) manufactured by the same company (Sonetronics). A communications headset consists of two earphones and a microphone with the capability to receive and transmit communications across a radio or intercom. The ECVCH headset provides improvements in situational awareness through the addition of a talk-through microphone, in hearing protection through thicker ear pads, and in greater field ruggedness. A set of evaluations was conducted to determine if the ECVCH showed improvements in attenuation and speech intelligibility over the MK1697/G headset. There was no improvement in sound attenuation with the ECVCH. The ECVCH showed a decrement in speech intelligibility, although this decrement was not large enough to impact operational performance. The difference in performance can be explained by the differences in frequency responses between the two headsets.
  note: Paula Henry, Jim A. Faughn, Timothy J. Mermagen.
  note: Title from title screen (viewed June 8, 2011).
  note: "February 2008."
  note: Final rept.
  note: Electronic resource.
  note: APPROVED FOR PUBLIC RELEASE.
  note: Includes bibliographical references (pages 14-15).
  subject:
    name:
      name part: United States.
      name part: Marine Corps
    topic: Equipment and supplies
  subject:
    topic: Communications, Military
    topic: Equipment and supplies
  subject:
    topic: Helmets
  subject:
    topic: Headphones
  subject:
    topic: Voice communications
  subject:
    topic: Protective Equipment
  subject:
    topic: Communication equipment
  subject:
    topic: Acoustic attenuation
  subject:
    topic: Intelligibility
  subject:
    topic: Helmets
  subject:
    topic: Ear protectors
  subject:
    topic: Test and evaluation
  subject:
    topic: Ruggedized equipment
  subject:
    topic: Earphones
  subject:
    topic: Acoustic properties
  subject:
    topic: Frequency response
  subject:
    topic: Microphones
  subject:
    topic: Intercommunication systems
  subject:
    topic: Marine corps equipment
  subject:
    topic: SPEECH INTELLIGIBILITY
  subject:
    topic: ECVCH(ENHANCED COMBAT VEHICLE CREWMAN HELMETS)
  subject:
    topic: COMMUNICATION HEADSETS
  subject:
    topic: HEARING PROTECTION
  subject:
    topic: SOUND ATTENUATION
  classification: D 101.133:4383
  related item:
    title info:
      title: ARL/TR ; 4383
  identifier: http://purl.fdlp.gov/GPO/gpo8295
  identifier: http://handle.dtic.mil/100.2/ADA478385
  access condition: APPROVED FOR PUBLIC RELEASE.
  record info:
    record content source: DTICE
    record creation date: 090122
    record change date: 20151202123125.0
    record identifier: in00002703011
    language of cataloging:
      language term: eng