What is the function of the black round hole next to the camera on the iPhone?

Black dot on the back of iPhone 11 Pro Max

The black dot on the back of the iPhone 11 Pro Max is the key feature for the Secondary Microphone. This is the second mic, also known as the secondary mic, built into the device.

The function of this black dot is to help absorb noise and filter sound during conversations when you use the phone.

When you receive a call to your iPhone, the main mic at the bottom edge of the phone will pick up your voice and transmit it. Meanwhile, the secondary mic at the black dot will focus on eliminating unwanted noise, helping to ensure clear sound and better call quality.

Usually, this secondary mic is located between the flash cluster and the rear camera of the iPhone. It looks like a small, inconspicuous black dot. Therefore, if you do not learn in advance, users often do not know the important role of this black dot in improving the sound quality of the device.

Black dot on the back of iPhone 12 Pro/Pro Max, 13 Pro/Pro Max

According to technology news siteZdnet, this is a LiDAR scanner. LiDAR is a method of measuring the distance to a target by using infrared rays to illuminate the target and using that light to build a 3D image of the environment around it.

The main function of the LiDAR scanner on the iPhone is to create a depth map of the surrounding environment. It is used in many photography functions, such as blurring the background and increasing the speed of autofocus.

LiDAR technology isn't new, but Apple introduced it to the iPhone in 2020 with the iPhone 12 Pro/Pro Max and continues to use it in the iPhone 13 Pro/Pro Max.

Since then, it has opened up many creative opportunities and improved user experience when using visual and spatial related functions.

Apple uses LiDAR technology for the iPhone because the sensor can work in all lighting conditions. This technology allows the iPhone to autofocus faster in low light conditions and helps take better portrait photos in low light.

However, the scanner’s functionality will be more effective if you use the right apps. One of them is the 3D Scanner App. This app allows you to do all sorts of interesting things with scans, edit 3D files, measure objects, and even share 3D files with others.

Another app that helps you get the most out of your iPhone’s LiDAR scanner is Canvas: LiDAR 3D Measurements. This app will save you hours of measuring with a ruler if you want to design or renovate your home. The app is easy to use and works very well, according to Zdnet.