Transmitter-receiver system e.g. heart rate monitor, for use during crawl stroke in swimming pool, has receiver designed such that receiver registers input into transmission range of transmitter

摘要

The system has a receiver (2) that is designed such that the receiver registers an input into a transmission range of a transmitter (1) in a digital or analog manner. The receiver is active and passive, and registered data is computationally or mathematically processed and evaluated. A transmitter is adjusted in a specific range, where frequency of the system is adjustable. The receiver ignores repeated perception of the input into the transmission range within a certain time interval.