Abstract 1,051,421. Cathode-ray tube displays. HITACHI Ltd. March 3, 1964 [April 3, 1963], No. 9033/64. Heading H4T. Signals (a1, Fig. 2) derived via a microphone A1 (Fig. 1, not shown), held in the region of the trachea and equalized in a circuit A2 (waveform a2) are displayed on the screen of a cathode-ray tube D against a time base which is triggered at a predetermined instant by a pulse (c). The latter is produced by counting in a circuit C a selected number of the pulses of a train (b1) produced in circuit B1 and the timespacing of which is equal to the period of the cycles of waveform (a1). Additionally, a circuit B 2 is employed to convert pulse train (b1) into a pulse train (b2) having amplitude variations corresponding to the variations in timespacing of (b1), i.e. amplitude variations corresponding to variations in pitch (frequency) of waveform (a1) and such variations are also displayed on the tube, e.g. by employing a dual beam tube. The input to circuit B1 may be replaced by the output of a reference generator E producing frequency modulated waves for calibration purposes. The tube preferably has a long persistence to facilitate direct visions.
Inventors
👤 Miura Tanetoshi
👤 Koshikawa Tsuneji
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-23 23:49
CPC Classifications
G; G10; G10L; G10L25/00; G10L25/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN APPARATUS FOR OBSERVING VOCAL CORD WAVES COMPRISING: MICROPHONE MEANS FOR EXTRACTING ELECTRIAL VOCAL CORD WAVES INCLUDING PITCH FLUCTUATION FEATURES OF VOCAL CORD VIRBATIONS FROM BODY WALL VIBRATIONS AT THE TRACHEA, FILTER MEANS OPERATIVELY COUPLED TO THE OUTPUT FROM SAID MICROPHONE MEANS FOR COMPENSATING FOR LOSS CHARACTERISTICS OF THE WALL OF THE TRACHEA TO SAID VOCAL CORD WAVES, AND TIME BASE DISPLAY MEANS OPERATIVELY COUPLED TO THE OUTPUT FROM SAID FILTER MEANS FOR DISPLAYING SAID VOCAL CORD WAVES INCLUDING THE PITCH FLUCTUATION FEATURES ON AN EXPANDED TIME BASE SCALE FOR OBSERVATION PURPOSES.
Claim 2
Independent Claim
92 words
AN APPARATUS FOR OBSERVING VOCAL CORD WAVES COMPRISING: MICROPHONE MEANS FOR EXTRACTING ELECTRIAL VOCAL CORD WAVES INCLUDING PITCH FLUCTUATION FEATURES OF VOCAL CORD VIRBATIONS FROM BODY WALL VIBRATIONS AT THE TRACHEA, FILTER MEANS OPERATIVELY COUPLED TO THE OUTPUT FROM SAID MICROPHONE MEANS FOR COMPENSATING FOR LOSS CHARACTERISTICS OF THE WALL OF THE TRACHEA TO SAID VOCAL CORD WAVES, AND TIME BASE DISPLAY MEANS OPERATIVELY COUPLED TO THE OUTPUT FROM SAID FILTER MEANS FOR DISPLAYING SAID VOCAL CORD WAVES INCLUDING THE PITCH FLUCTUATION FEATURES ON AN EXPANDED TIME BASE SCALE FOR OBSERVATION PURPOSES.