| 摘要 |
There is disclosed a portable programmable device including a battery, a memory and a terminal connectable to earpieces, the device including in the memory a calibration file relating to audio sensitivity of the earpieces, the device being configured to play media data including audio, and to provide audio output to the earpieces, the device being further configured, using the calibration file, to calculate a noise dose relating to a sound exposure of a user resulting from audio output provided to the earpieces, and to record the noise dose on the device. The device is configured to adjust audio output level in response to: the played audio content, the calibration file, and the users noise dose data recorded on the device. Also disclosed are a method of calibrating earpieces by supplying audio frequencies to the earpiece and recording the response, a method of dose monitoring with low data and power requirement and method of transforming does levels into logarithmic form. |
