Automotive Max SPL Test Sequence
A test sequence to measure the Maximum Sound Pressure Level (SPL) of a car infotainment system in the vehicle’s cabin.
The sequence measures the Max Sound Pressure Level (SPL) of a car infotainment system in the vehicle’s interior.
The sequence uses a 6 microphone array mounted at either the driver or passenger locations. A 30 second pink noise stimulus having an RMS level of -12 dBFS is played through the infotainment system and captured by SoundCheck’s Multi-channel Real Time Analyzer (RTA). The Multi-channel RTA produces 6 RTA curves which are then power averaged to produce a Max SPL Spectrum. The spectrum is then power summed to produce a single value for Max SPL.
This measurement method corresponds to that under evaluation by the AES Technical Committee on Automotive Audio (TC-AA). This working group presented a detailed explanation of their work during AES Fall Online 2021. You may view this presentation courtesy of the Audio Engineering Society (AES).