An electronic device is capable of outputting sound. The electronic device includes a selection member, a detecting member, a comparing member, and an audio control member. The selecting member is configured to select a usage pattern of the electronic device, wherein the usage pattern includes at least two usage modes. The detecting member is configured to real-time detect the pulse beat frequency value of a human body. The comparing member is configured to compare the size of the pulse beat frequency value of the human body with a reference value, and generate control signal corresponding to the result. The audio control member is configured to adjust the volume of the electronic device according to the current selected pattern when the pulse beat frequency value of the human body is less than the reference value. The present invention is also provided a method of volume control for the electronic device.一種電子裝置,可輸出聲音。該電子裝置包括:選擇單元,用於選擇該電子裝置的使用模式,該使用模式至少包括兩種使用模式;偵測單元,用於即時偵測人體脈搏的跳動頻率;比較單元,用於判斷根據該偵測單元所偵測的人體脈搏跳動頻率與一參考值的大小,並根據該判斷結果產生一控制信號;及音頻控制單元,用於在比較單元比較出人體脈搏跳動頻率小於該參考值時,根據該電子裝置所選擇的使用模式,調節該電子裝置的音量。本發明還提供了一種電子裝置的音量控制方法。S201~S206...步驟
