Patent ID: 11911162
Assignee: CONTROLE INSTRUMENTATION ET DIAGNOSTIC ELECTRONIQUES—CIDELEC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A method comprising:
determining a pulse rate through use of a sound detector placed on an individual's trachea, the determining comprising the following acts:
recording sound signals for a predefined duration;
filtering digital signals representative of the sound signals by using a finite impulse response adaptive filter,
applying a lowpass filter to the filtered digital signals in order to select signals comprised in a specified passband,
selecting a first temporal portion of filtered digital signals of a specified duration,
intercorrelating with a temporal portion of filtered digital signals that follows the first temporal portion in time and is of a same duration,
searching for, for each portion, a temporal position of the intercorrelation maximum,
computing a time interval corresponding to this temporal position and computing the pulse rate corresponding to this temporal position,
repeating the acts of selecting, intercorrelating, searching, and computing the pulse rate throughout the predefined duration of the recording, to obtain a temporal series of pulse rates.