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:
Oct. 16, 1984
Filed:
Nov. 05, 1982
Gerd-Wolfgang Gotze, Berlin, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An audiometer which can be battery operated, is reliable and economical in current consumption has a digital control unit (10) which controls a LCD in matric form (11, 26). The digital control unit, in its simplest form, includes a data input stage (12) having two inputs (16, 18) receiving, respectively, input signals representative of amplitude and tone, or a spoken word, and a further input (14) which is test-person controlled, to provide a perception signal, operated by the person to be tested when the level of a certain tone, generated by a tone generator (G, 21) is perceived, or a spoken word is correctly heard. The data input stage is connected to a data bus which provides the respective data to a driver circuit (24) to drive the LCD matrix. Various accessories can be provided, such a curve generating stage (45), a memory (42), an output unit for a recorder, such as a plotter, and a separate input/output state (46) to receive, for example, stored data for comparison of an audiogram being taken of a test-person with prior, or statistically derived audiograms.