Filter for use with pulse-wave sensor and pulse wave analyzing apparatus

A pulse wave analyzing apparatus, comprising:

• a pulse wave sensor which is adapted to be worn on a body portion of a living subject to detect a pulse wave from the body portion, and outputs a pulse wave signal representing the detected pulse wave;
• a plurality of filters for use with the pulse wave sensor, the plurality of filters having respective low-side cut-off frequency bands differing from each other, and each receiving the pulse wave signal outputted by the pulse wave sensor;
• a provisional rising point determining means for determining a time of detection of a provisional rising point of each of respective pulse waves represented by respective signals that have passed through the filters;
• and
• a proper rising point determining means for comparing the respective times of detection of the respective provisional rising points, each determined by the provisional rising point determining means, with each other, and thereby determining a time of detection of a proper rising point based on the respective times of detection of the respective provisional rising points.

A pulse wave analyzing apparatus, comprising:

• a pulse wave sensor which is adapted to be worn on a body portion of a living subject to detect a pulse wave from the body portion, and outputs a pulse wave signal representing the detected pulse wave;
• a plurality of filters for use with the pulse wave sensor, the plurality of filters having respective low-side cut-off frequency bands differing from each other, and each receiving the pulse wave signal outputted by the pulse wave sensor;
• a provisional rising point determining device which determines a time of detection of a provisional rising point of each of respective pulse waves represented by respective signals that have passed through the filters;
• and
• a proper rising point determining device which compares the respective times of detection of the respective provisional rising points, each determined by the provisional rising point determining device, with each other, and thereby determining a time of detection of a proper rising point based on the respective times of detection of the respective provisional rising points.