A-Weighting vs C-Weighting vs Z-Weighting Guide (Arabic)

Learn the differences between dBA, dBC, and dBZ acoustic weightings, their frequency response curves, and why OSHA and environmental noise regulations mandate A-weighting.

R_A(f) = 12194² · f⁴ / [(f² + 20.6²) · (f² + 12194²) · √(f² + 107.7²)(f² + 737.9²)]

Equal-Loudness & Psychoacoustic Weighting

The human auditory system perceives frequencies according to ISO 226:2003 equal-loudness contours.

Comparison of Weighting Curves

A-Weighting (dBA) simulates 40-phon human ear response; C-Weighting (dBC) measures high sound pressure levels; Z-Weighting (dBZ) provides flat electrical response according to IEC 61672-1.

Audition in Visualizer Studio

Test these acoustic concepts with live microphone or test tone signals. Leq Sound Level & Noise Meter.

Launch Noise Meter