Psychoacoustic AGC Lab
Receiver DSP
Perceptual Evaluation & Tuning: Auditory Scene Segregation, Hang Dynamics, and Noise Pumping
▶ Play Scenario
🧪 Blind A/B/X Test
Linked Diversity
Binaural BMLD
Master Vol
🧪 Double-Blind MUSHRA Evaluation Mode
Algorithm identities are hidden to prevent confirmation bias
Play [A]
Play [B]
Play [X] (Hidden Match)
Intelligibility & Separation (1-5):
Listening Comfort / Low Fatigue (1-5):
Reveal & Score
Exit
[1] Baseline
Leaky Power AGC
Single-pole detector
[2] WDSP / NR0V
Hang + Lookahead
Frozen gain in pauses
[3] Dual-Time-Constant
Syllabic + RMS Limiter
Preserves speech dynamics
[4] Sub-Band / ERB
4-Band Filterbank
Prevents pileup ducking
[5] Noise-Adaptive
Floating Knee
100% linear below noise
[6] Pitch-Tracker
Adaptive Resonator
Decoupled tone vs noise
Real-Time Multi-Trace Envelope (0 to -50 dBFS)
Live Rolling Audio History
Communication Passband Spectrum (0 to 3.5 kHz)
Filterbank Crossovers & Pitch Tracker
Hardware Meters
HANG
Input Peak
-90 dBFS
Gain Reduction
0.0 dB
Output Peak
-90 dBFS
Objective Psychoacoustic Scores
Speech Modulation Depth (STI)
--%
Noise Pumping (Fatigue Score)
--
Ducking Depth:
0 dB
Stereo Balance:
0.0 dB
Test Scenario
RF / Audio Stimulus
CW Pileup (Loud + Weak + Noise)
Multi-Talker SSB Contest Pileup
Selective Multipath Fading (Swept Null)
Dual-Antenna Spatial Diversity (Linked vs Unlinked)
Severe Rayleigh Flutter (4 Hz)
Weak Signal Near Noise (+2 dB)
Atmospheric Static Crashes
Formant Speech Simulation
Custom WAV Upload
Dynamic Parameters
Hang Duration
300 ms
Compression Knee
-50 dBFS
Decay Rate
200 dB/s
Inter-Band Coupling
15%
Knee Above Noise Floor
+8 dB
Pitch Tracker Center
650 Hz