Term-LAB is based on award winning innovative technology that changes the way sound is measured inside a car. The heart of the system is the Precision SPL Sensor that attaches to the inside of the windshield with two suction cups. This attachment method alleviates the need for bulky microphone stands. In addition, the Precision SPL Sensor is based on Sensor Technology instead of the antiquated microphone capsules that have been used in the past. Please click HERE to read more about the differences between microphones and the Term-LAB Precision SPL Sensor.