Abstract: The present invention disclosed relates to heart beat analysis device and method capable of measuring the heart beats of an individual in physical exercise, notifying the individual of a suitable exercise amount with messages or warning sounds, and allowing the individual to listen to the radio or music.

Abstract: The present invention relates to a tape simulator of a cassette tape type digital audio/video device built in the cassette tape type digital audio/video device and capable of normally operating a cassette deck player by having the tape simulator recognized as a cassette tape as reproducing voice/video digital signals recorded in the device in use of the cassette deck player. The tape simulator of the cassette tape type digital audio/video device according to the present invention comprises left and right reel hubs inserted in both driving reels of the cassette deck player to be rotated; and a rotation speed attenuating unit for attenuating the rotation speeds of the left and right reel hubs to at a predetermined rate by providing resistance to the left and right reel hubs rotated by the driving reels.