The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 1994
Filed:
Dec. 16, 1992
Alan P Dieken, Oakdale, MN (US);
Jon A Kirschhoffer, White Bear Lake, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A binaural electronic stethoscope adapted to receive auscultatory sounds from a body and adapted to transmit the auscultatory sounds to a user. A chestpiece is adapted to be utilized in cooperation with the body. An acoustical transducer cooperates with the chestpiece and receives auscultatory sounds and transforms the auscultatory sounds into an electrical input signal. A signal processor processes the electrical input signal to produce an electrical output signal. A first tubular member couples the chestpiece to a housing. A speaker is mounted within the housing and converts the electrical output signal into an acoustical output signal. Second and third tubular members are coupled to the housing and are acoustically coupled to the speaker. First and second earpieces are coupled to the second and third tubular members, respectively, and receive the acoustical output signal and provide the acoustical output signal to the user. The first tubular member has an acoustical cavity acoustically coupled to the speaker in the housing. In this way, the acoustical cavity of the first tubular member and the second and third tubular members form a sound chamber both in front of and behind the speaker providing balanced acoustical response.