Accession Number : AD0692803

Title :   DEVELOPMENT OF A SMALL MICROPHONE SUITABLE FOR USE IN A NEW, SMALL, LIGHT-WEIGHT, ORAL-NASAL BREATHING OXYGEN MASK.

Descriptive Note : Final engineering rept. on task 3,

Corporate Author : BALDWIN PIANO CO CINCINNATI OHIO

Personal Author(s) : Duncan,Robert K.

Report Date : NOV 1957

Pagination or Media Count : 83

Abstract : A noise cancelling microphone was partially developed for use in aircraft oxygen masks. Several types of microphones were studied and examined. Various models were constructed and analyzed. Some word articulation testing was conducted and some preliminary environmental tests were made. (Author)

Descriptors :   (*OXYGEN MASKS, MICROPHONES), FLIGHT CREWS, NAVAL AIRCRAFT, ENVIRONMENTAL TESTS, NOISE

Subject Categories : Electrical and Electronic Equipment
      Life Support Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE