Headphone EQ Curve & Acoustic Target Studio

Acoustic Baseline & Filters

Tested Headphone Profile Raw Measured

Acoustic Reference Target Harman AE/OE

Select Filter Band (Drag on plot or edit below):

Band 1: Low Shelf Active

Filter Topology

Center / Cutoff Frequency 105 Hz

Gain (dB) -2.5 dB

Q Quality Factor / Resonance 1.40

Preamp Digital Headroom -3.0 dB

Prevents inter-sample DAC clipping when boosting filter peaks.

RMS Error 2.8 dB

Max Boost +4.2 dB

Target Delta -1.1 dB

Export File Format

Frequency Response & Transfer Function (20 Hz - 20 kHz)

Interactive Bode Plot (Click & drag nodes)

Raw Measured Headphone

Acoustic Target Curve

Parametric EQ Response

Post-EQ Corrected Result

Ready. Drag nodes or adjust filters to shape acoustics.

IEC EN 60268-7 headphone simulation • 64-point log biquad transfer engine

Acoustic Science, Harman Target Compliance & Parametric EQ Architecture

Why Wireless 'Pro' Audio Needs Custom Parametric EQ

Standard consumer headphones often boost sub-bass and introduce erratic pinna resonances around 4 kHz to 8 kHz. Professional audio workflows demand adherence to calibrated target responses like the Harman OE Target (developed by Dr. Sean Olive and Todd Welti) or Diffuse-Field targets, creating a neutral soundstage comparable to calibrated studio monitors in an acoustically treated control room.

Biquad Digital Filter Mathematics

Each active band implements an exact second-order IIR biquad transfer function:
H(s) = (b0 + b1·z⁻¹ + b2·z⁻²) / (1 + a1·z⁻¹ + a2·z⁻²)
Coefficients are recalculated in real time from cutoff frequency, sampling rate (48 kHz), gain in decibels, and Q factor. The live audition engine utilizes the browser's hardware-accelerated BiquadFilterNode pipeline.

Export Compatibility

The generated configuration is 100% compatible with Equalizer APO, Peace GUI, Wavelet (Android), Qudelix 5K, Sonarworks, and Roon parametric equalizer engines. Preamp attenuation is computed dynamically to avoid digital clipping.