| 摘要 |
An apparatus and method for controlling the volume of a device's user alert sound based on an analysis of the device's environment. The device emits a signal and receives a resulting reflected signal. A processor measures characteristics such as the amplitude and/or delay of the reflected signal to determine the type of environment in which the communication device is located. The volume of the alert sound is then adjusted based on the type of environment indicated by the characteristics of the reflected signal. For example, if the characteristics indicate a closed environment, such as a briefcase, the volume is adjusted to high level, and if the characteristics indicate an open environment such as a desktop, the volume is adjusted to a low level.
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