Abstract: The dual-chamber whistle is a sound producing device that creates a first air flow, a second air flow and a third air flow within the dual-chamber whistle. The basic sound of the dual-chamber whistle is generated by a first turbulence created the interaction of the first air flow and the second air flow. The third air flow also interacts with both the first air flow and the second air flow to create a second turbulence. This second turbulence creates an additional sound called the oversound. While actual patterns of turbulences created in both the first turbulence and the second turbulence are essentially random, the human psychological response to the oversound is to interpret the oversound as an actual call for help. The dual-chamber whistle comprises an intake, an exhaust, and a router which creates a complex air flow.

Abstract: The present application relates to an authentication process and system for a wireless communication system between a host device and a client device. This authentication process and system can make the confirmation of the authentication easier and clearer.

Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that a player for a removable optical storage medium can decode and display the digital photo album file, and the index file so that the index file comprises still thumbnail image data and pointer which is a command to jump to a certain chapter or segment of digital photo album file including still image or movie corresponding to the thumbnail image.

Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that reproducing of the image and the reproducing of the background music ends at the same time.

Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that reproducing of the image starts with the reproducing of the background music without complicated process for synchronizing the reproducing of the background music and the images.

Abstract: The present application relates to a digital photo album producing apparatus which can produce the digital photo album file so that when the digital photo album is reproduced, both of the background music and audio of movie can be reproduced at good balance.

Abstract: A monitoring system uses infrared photoplethysmography to monitor the pulse of a person wearing a wrist unit, and the wrist unit sends RF signals which describe his heart condition to a base unit. If the wrist unit detects a cardiac arrest or if the wearer manually signals an emergency, both the wrist and the base units sound local alarms. The base unit also telephones others outside of the user's home to alert them to the emergency. The wrist unit is designed to be fail-safe and to prevent false alarms. When the wrist unit fails to detect a pulse, it makes several further attempts to detect a pulse before signalling a cardiac arrest emergency. A prioritization and output activation circuit activates wrist unit outputs, including audio signals, an RF signal transmitter, and a display, according to a predetermined priority when more than one condition requiring a response exists.