| 摘要 |
Through the use of an electro-acoustic transducer, a pressure wave of at least a predetermined intensity may be detected, such as one that may occur upon the activation of a vehicle's air bag. As the electro-acoustic transducer has a diaphragm that can be displaced under the influence of a pressure wave, the transducer can therefore be monitored for an event occurrence indicative of the pressure wave. This monitoring may involve passively monitoring an electrical connection of the transducer for an electrical signal of a predetermined level, such that the electrical signal is the event indicative of the pressure wave. The monitoring may involve passively monitoring a pressure switch, such that activation of the pressure switch is the event indicative of the pressure wave. Upon detection of the pressure wave event, a trigger signal may be output to an emergency notification device to instigate a communication regarding a possible emergency situation.
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