Abstract: In an emergency notification and rescue request system having an answer detector for detecting a call receiving party's answer to a telephone call, the answer detector comprises a level detector for outputting a first signal when a level of an audio signal on a telephone line is greater than a prescribed level and otherwise outputting a second signal which is different from the first signal, wherein an interval between adjacent prescribed state changes in the output signal from the level detector is computed every time the prescribed state change is detected, and the current and previous intervals are compared so that if such an event that the current and previous intervals do not substantially correspond to each other has occurred prescribed times consecutively, it is determined that no regular signals such as the busy signal or ring signal exist on the telephone line, i.e., the call receiving party has answered the telephone call.

Abstract: In an emergency notification and rescue request system having an answer detector for detecting a call receiving party's answer to a telephone call, the answer detector comprises a level detector for outputting a first signal when a level of an audio signal on a telephone line is greater than a prescribed level and otherwise outputting a second signal which is different from the first signal, wherein an interval between adjacent prescribed state changes in the output signal from the level detector is computed every time the prescribed state change is detected, and the current and previous intervals are compared so that if such an event that the current and previous intervals do not substantially correspond to each other has occurred prescribed times consecutively, it is determined that no regular signals such as the busy signal or ring signal exist on the telephone line, i.e., the call receiving party has answered the telephone call.

Abstract: In an emergency notification and rescue request system, comprising: a plurality of input terminals for receiving signals from a sensor(s) or from a transmitter operable by a user; an automatic telephone dialer for selectively making a telephone call to a plurality of parties; and a memory for storing a plurality of messages, one or more call receiving parties are set for each of the input terminals and wherein one or more of said plurality of messages can be selectively assigned to each of the set call receiving parties or to each of the set combinations of the call receiving parties and input terminals so that upon a signal input to any one of said input terminals, a telephone call is made to said one or more call receiving parties set for the input terminal to transmit the messages assigned to said call receiving parties.

Abstract: The distress call emitting device comprises an earthquake sensor for detecting an earthquake of a prescribed intensity or greater and/or a receiver for receiving a radio signal from a remote transmitter. Therefore, even when the user is unable to call for a help, the distress call emitting device of the present invention produces a distress call in his behalf by sound and/or light. The distress call can be initiated either by detecting the intensity of the earthquake or by operating a remote transmitter which may be carried by the user. If the device is linked to a telephone line, the distress call can be made also through a telephone line. Thus, even when the user is too weak to call for a help by his own effort, the device is either automatically activated by an earthquake or remotely activated by pressing a switch on a portable transmitter.

Abstract: A noise/vibration measuring and disclosing system, comprises: a detecting unit for detecting noise/vibration generated from a work site; a display unit for displaying a measured value of noise/vibration detected by the noise/vibration detecting unit; and a control unit for controlling the detecting unit and the display unit. The noise/vibration display unit is placed at a location visible from outside the premises of the work site so that the measured values of noise and vibration can be effectively disclosed to the local residents.