Verifying Correction

Why Verify?

The predicted correction curve Sounn shows is based on the original measurement. But several factors can cause the actual result to differ:

• Measurement position shifted: Even small changes in mic position change the measured response
• Room changes: Temperature, furniture position, or even humidity can affect acoustics
• Signal chain issues: Verifies the correction is actually being applied
• Nonlinear behavior: Room acoustics at measurement levels may differ from listening levels

Taking a Verification Measurement

Setup

1. Position microphone in exactly the same spot as your original measurement (or as close as possible)
2. Enable room correction in Sounn (correction should be ON)
3. Ensure the same speaker volume as the original measurement

Measurement Steps

1. Go to Measure tab
2. Click New Measurement
3. Check the box "This is a verification measurement" (or use the Verification mode in advanced options)
4. Take the measurement as normal
5. Sounn will automatically compare to your target curve

Interpreting Results

What to Look For

After verification, Sounn shows several curves:

• Original (uncorrected): Your room before correction (gray)
• Target: The desired response (dashed)
• Verification (corrected): Actual measured response with correction (colored)

Good Results

• Verification curve follows target curve within ±3 dB across most frequencies
• Major peaks and dips from original are significantly reduced
• Bass region shows tighter control with less variation

Metrics

Sounn provides quantitative metrics:

Common Issues

Verification Looks Worse Than Original

This usually means:

• Correction is off: Check that correction is enabled in Sounn
• Wrong output device: Audio may be going through a different path
• Position changed: Mic isn't in the same spot

Bass Correction Didn't Improve

Possible causes:

• Null (not a peak)—difficult to correct
• FIR filter too short for this frequency
• Maximum boost limit preventing adequate correction

Treble Shows Large Variations

This is often normal:

• Small position changes have large effect at high frequencies
• Head movement during measurement
• Comb filtering from reflections is very position-dependent

Results Vary Between Verification Attempts

Some variation is expected. Focus on consistent improvement in overall trends rather than matching exact frequencies.