Vehicle Cabin Acoustic Characterization & SPL Optimization
±2dB
Frequency flatness
~6dB
Mid-band uniformity ↑
62Hz
Resonance eliminated
Automotive cabin audio quality is limited by uneven frequency response and structural-acoustic resonances that degrade the listening experience.
Characterize and optimize a multi-speaker vehicle audio system to achieve flat frequency response and eliminate structural noise paths.
Led DAQ instrumentation with an 831C SLM under white-noise excitation. Applied FFT analysis in MATLAB and iteratively tuned 13 octave-band gains. Diagnosed a 62 Hz structural-acoustic resonance traced to speaker-cone contact with door plastic. Designed an impulse-response measurement protocol at 200× temporal resolution.
Achieved flat ±2 dB frequency response from 64 Hz to 16 kHz. Improved mid-band SPL uniformity by ~6 dB. Eliminated the 62 Hz resonance through precision mechanical modification.