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027 a| NSMRL-1214;

029 0 a| DTICEb| ADA394261;

035 a| (Sirsi) o227972609;

042 a| pcc;

043 a| n-us---;

049 a| ERE#;

074 a| 0385-C (online);

086 0 a| D 206.10:1214;

100 1 a| Russotti, J. S.q| (Joseph S.)=| ^A1115421;

245 10 a| Noise reduction stethoscope for United States Navy application /c| by Joseph S. Russotti [and others].;

260 a| Groton, CT :b| Naval Submarine Medical Research Laboratory,c| [2000];

300 a| 1 online resource (iv, 61 pages) :b| color illustrations.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| NSMRL report ;v| no. 1214;

500 a| The original document contains color images.;

506 a| APPROVED FOR PUBLIC RELEASE.;

520 a| Conventional stethoscopes cannot function effectively unless ambient noise is maintained at approximate clinical levels (approximately 70 dB SPL). This serious limitation inhibits diagnosis and monitoring of patients in a variety of common military medical situations: in field hospitals, in high ambient noise environments such as engine rooms, in vehicles such as ambulances, fixed and rotary wing aircraft, or in hyperbaric chamber treatment facilities. Trying to measure blood pressure, determining if a faint heartbeat is present in a casualty, or listening to respiratory events can be nearly impossible under field conditions. Technology is immediately available to dramatically reduce this shortfall. The objective of this research was to evaluate several compact noise-reducing/canceling stethoscopes for field, moderately-loud medical- transport, and shipboard use in noisy environments. Three commercial off the shelf (COTS) noise reducing stethoscopes, having electronic outputs, were evaluated quantitatively in a controlled laboratory study. Laboratory data on detection of vital sounds in operationally- relevant sound-fields showed the devices. ability to adequately present abnormal heart and breath sounds in 90 to 95 dB SPL. By their design these devices could tolerate higher levels of environmental noise that normally would interfere with such detection. This is a significant improvement in the tolerable ambient sound-field over an average 76 dB SPL upper limit for detecting abnormal breath sounds, and an average 81 dB SPL upper limit for detecting abnormal heart sounds, when using a conventional device. After laboratory and operational evaluation, we are able to recommend two available COTS devices for military use, and to suggest a prototypic device, (a vastly miniaturized version of one of the two devices we recomfof the various software programs that allow acoustic records of patient pathology).;

500 a| Title from title screen (viewed Sept. 5, 2012).;

536 a| Naval Medical Research Development Commandh| 64771N-M00933.002-5624;

500 a| "25 July 2000.";

504 a| Includes bibliographical references (p. 34-36).;

650 0 a| Stethoscopesx| Evaluation.=| ^A843074;

650 0 a| Stethoscopesx| Technological innovations.=| ^A843074;

650 17 a| Medical Facilities, Equipment and Supplies.2| scgdst;

650 27 a| Acoustics.2| scgdst;

650 17 a| Noise reduction.2| dtict;

650 17 a| Stethoscopes.2| dtict;

650 27 a| Clinical medicine.2| dtict;

650 27 a| Operational effectiveness.2| dtict;

650 27 a| Diagnosis(medicine)2| dtict;

650 27 a| Military medicine.2| dtict;

650 27 a| Patients.2| dtict;

650 27 a| Ambient noise.2| dtict;

650 27 a| Medical equipment.2| dtict;

653 2 a| PE64771N;

653 2 a| WU5624;

710 1 a| United States.b| Naval Medical Research and Development Command.=| ^A1115149;

710 2 a| Naval Submarine Medical Research Laboratory.=| ^A469995;

830 0 a| Report (Naval Submarine Medical Research Laboratory) ;v| no. 1214.=| ^A469993;

856 40 u| https://purl.fdlp.gov/GPO/gpo27835;

856 40 u| http://handle.dtic.mil/100.2/ADA394261;

949 a| Click on web addressw| ASISh| JOYNER94;

998 a| 3110095;

998 a| u3110095;

596 a| 1;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 3110095-1001l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 10/10/2012x| EDOCUMENTz| JERESOURCE;

Noise reduction stethoscope for United States Navy application / by Joseph S. Russotti [and others].

Author/creator	Russotti, J. S.
Other author	United States. Naval Medical Research and Development Command.
Other author	Naval Submarine Medical Research Laboratory.
Format	Electronic
Publication Info	Groton, CT : Naval Submarine Medical Research Laboratory, [2000]
Description	1 online resource (iv, 61 pages) : color illustrations.
Supplemental Content	https://purl.fdlp.gov/GPO/gpo27835
Supplemental Content	http://handle.dtic.mil/100.2/ADA394261
Subjects	Stethoscopes--Evaluation. Stethoscopes--Technological innovations. Medicine, Military--United States. --Equipment and supplies. --Evaluation.

Series	NSMRL report ; no. 1214 Report (Naval Submarine Medical Research Laboratory) ; no. 1214. ^A469993
Abstract	Conventional stethoscopes cannot function effectively unless ambient noise is maintained at approximate clinical levels (approximately 70 dB SPL). This serious limitation inhibits diagnosis and monitoring of patients in a variety of common military medical situations: in field hospitals, in high ambient noise environments such as engine rooms, in vehicles such as ambulances, fixed and rotary wing aircraft, or in hyperbaric chamber treatment facilities. Trying to measure blood pressure, determining if a faint heartbeat is present in a casualty, or listening to respiratory events can be nearly impossible under field conditions. Technology is immediately available to dramatically reduce this shortfall. The objective of this research was to evaluate several compact noise-reducing/canceling stethoscopes for field, moderately-loud medical- transport, and shipboard use in noisy environments. Three commercial off the shelf (COTS) noise reducing stethoscopes, having electronic outputs, were evaluated quantitatively in a controlled laboratory study. Laboratory data on detection of vital sounds in operationally- relevant sound-fields showed the devices. ability to adequately present abnormal heart and breath sounds in 90 to 95 dB SPL. By their design these devices could tolerate higher levels of environmental noise that normally would interfere with such detection. This is a significant improvement in the tolerable ambient sound-field over an average 76 dB SPL upper limit for detecting abnormal breath sounds, and an average 81 dB SPL upper limit for detecting abnormal heart sounds, when using a conventional device. After laboratory and operational evaluation, we are able to recommend two available COTS devices for military use, and to suggest a prototypic device, (a vastly miniaturized version of one of the two devices we recomfof the various software programs that allow acoustic records of patient pathology).
General note	The original document contains color images.
General note	Title from title screen (viewed Sept. 5, 2012).
General note	"25 July 2000."
Bibliography note	Includes bibliographical references (p. 34-36).
Access restriction	APPROVED FOR PUBLIC RELEASE.
Funding information	Naval Medical Research Development Command 64771N-M00933.002-5624
Technical rpt#	NSMRL-1214
GPO item number	0385-C (online)
Govt. docs number	D 206.10:1214

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	Electronic Resources	Online Content https://purl.fdlp.gov/GPO/gpo27835 http://handle.dtic.mil/100.2/ADA394261	✔ Available

Noise reduction stethoscope for United States Navy application / by Joseph S. Russotti [and others].

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