Driver Acoustic Sensitivity And Frequency Response

A sensitivity number without voltage, distance, boundary, and frequency band is incomplete.

Voltage and power references

2.83 V produces one watt only into an 8-ohm resistor. For other loads, state whether the result is voltage sensitivity, one-watt sensitivity, or another reference and use the measured terminal condition.

Choose the boundary

near field for local cone or port behaviour
gated far field for mid/high response before reflections
ground plane or large baffle for low-frequency extension
sealed or vented enclosure for application behaviour
installed vehicle measurement for final boundary effects

Document geometry

Record microphone, calibration, distance, axis, acoustic reference, driver orientation, baffle, room, gate, window, smoothing, averaging, and terminal voltage.

Stitching requires overlap

Near-field and far-field curves need compatible level references, valid overlap, boundary correction, and phase treatment. A cosmetic splice is not a verified full-range response.

Measure directivity and level dependence

Capture nearby axes or the intended listening window, then repeat at a higher terminal voltage to reveal compression or measurement-chain nonlinearity.