iPhone patent can automatically adjust the volume

Recently, the United States Patent and Trademark Office published a patent application submitted by Apple. In this document, Apple describes an iPhone that automatically adjusts the volume based on the distance between the body and the user.

The patent's description is "detect distance adjustment volume", use the iPhone's built-in sensor to calculate the distance from the phone to the human ear and automatically adjust the volume, or switch between the handset and the speaker to achieve the best results. When the iPhone is close to the human ear, the volume of the handset automatically decreases; otherwise it automatically increases. When the user puts down the phone or takes the phone far away, the audio output will turn from the handset to the speaker, and the speaker volume can also be automatically adjusted according to the distance between the iPhone and the user. In addition, the iPhone's sensor automatically adjusts the sound quality according to the distance between the mobile phone and the user.