Table 1.
Smartphone built-in sensors and their uses.
| Built-in Sensors of SP | Usual Use in SP | Use in Fall Detection & Prevention |
|---|---|---|
| Accelerometer | Senses the changes in orientation of SP and adjusts the viewing angle accordingly. | [60] |
| Gyroscope | Detects angular momentum (roll, pitch and yaw); facilitates game. | [60] |
| Magnetometer | Senses the Earth's magnetic field; works as a digital compass. | [60] |
| Barometer | Measures atmospheric pressure; facilitates weather widgets. | [61] |
| Image Sensor | Provides still picture and video capturing facilities. | [62] |
| Microphone | Sound capture. | [63] |
| Wi-Fi sensor | Facilitates wireless communication through Wi-Fi. | [64] |
| Bluetooth Sensor | Facilitates wireless communication through Bluetooth. | [60] |
| Location sensors (GPS) | Targets or navigates by map or picture with the help of GPS satellites. | [2] |
| Temperature Sensor | Measures temperature; facilitates weather widgets. | [65] |
| Humidity Sensor | Measures humidity; facilitates weather widgets. | [65] |
| Ambient Light Sensor | Adjusts the display brightness. | [66] |
| Proximity Sensor | Detects how close our SP's screen is to our body. | [67] |
| Touch Sensor | Helps to operate the SP through touching. | - |
| NFC Sensor | Establishes communication between similar device by touching or bringing them into proximity. | [68] |
| Infrared Sensor | Can sense temperature. | [69] |
| Back-Illuminated sensor | Adjust the light captured while capturing a photograph. | - |