The iPhone7 uses surround sound, so the front headphones and side speakers will sound at the same time. However, due to the low power consumption of the front receiver, it is normal that there may be noise when playing music. The modification method is as follows. Enter the Setup-General-Auxiliary function, and when you slide down, you will see a Setup button to adjust the left and right channels, so that the front receiver will not work (except for making a phone call), and the noise will naturally disappear at the expense of giving up surround sound. If you don't want to give up surround sound. Then another way is to open the compatibility of settings-general-auxiliary functions-hearing AIDS, which can effectively reduce the noise of the front receiver.