The use to which the telephone in the environment whose noise is large is expanded

摘要

The telephone (100) the method of expanding use is offered. This method in order step and detect the noise level around step and the description above which receive arrival telephone call around being detected, when noise level is larger than specified threshold noise level, the aforementioned arrival telephone call from to become understanding possible with the receiving believer of the aforementioned arrival telephone call, includes with the step which emphasizes the said arrival telephone call. The description above the step which is emphasized, the step which expands the volume of the aforementioned arrival telephone call for the receiving believer of the aforementioned arrival telephone call automatically, and/or converts the aforementioned arrival telephone call to the text and is good including the step which indicates the aforementioned text vis-a-vis the receiving believer of the aforementioned arrival telephone call.