YOUR ROOM.
HEAR THE DIFFERENCE.

Burst generator: short tones separated by silence. Use the silent gap to listen for ringing at a particular frequency.

Sine wave: a continuous tone for exploring how a frequency varies across the room. Use small frequency adjustments to find a resonance; the one-third-octave buttons provide larger steps.

Pink noise: equal energy per octave before filtering. Useful for a broad impression of bass balance.

White noise: equal power per hertz before filtering. It puts more energy into higher octaves than pink noise. Use the cutoff controls to focus on the band you want to investigate.

Connect your computer to your normal playback system. Start with your monitor volume low and increase only to a comfortable level. Low-frequency tones can be difficult to hear even when a speaker is working hard. Do not increase the level just to feel vibration.

Select Left or Right to test one speaker first, then compare the other channel. Stereo sends an identical signal to both channels; their interaction may change the result. The output selector follows your audio device’s channel mapping.

Keep the speaker position, playback level and listening position fixed when comparing AVAA active and inactive. The tool generates signals; it does not use your microphone or measure decay time.

1. Choose a frequency. Start with a resonance identified by listening or a room measurement. The default 63 Hz is a starting point, not a diagnosis.
2. Leave a clear pause. Start with about 1 second between bursts. The pause begins after each burst ends. Increase it if the ringing continues into the next burst.
3. Set the number of oscillations. Start around 10 cycles. More cycles produce a longer tone; fewer cycles make the burst shorter and broaden its spectrum.
4. Press Start. Listen to the sound after each burst, especially the tonal tail during the pause.
5. Compare AVAA inactive and active. Repeat several times at the same settings. Listen for a shorter, less persistent tail. A change in loudness alone does not quantify decay.
6. Repeat at other frequencies. Evaluate several problem frequencies and return to your normal listening position.

Shortening the pause makes the sequence denser, but it is not a calibrated test of AVAA performance. This version keeps bursts separate rather than overlapping them.

Enter a frequency from 10 to 200 Hz and press Start. Adjust the value in small increments around a suspected resonance. A one-third-octave step multiplies or divides the frequency by approximately 1.26; it is a navigation shortcut, not a precise way to identify a narrow peak.

At a modest, fixed playback level, listen at several positions. A room mode can sound strong near one boundary and weak elsewhere. A weak tone at one location may be a pressure minimum, not evidence that the resonance is absent.

Use the continuous tone to help explore placement, then compare AVAA active and inactive from the same listening position. Confirm the effect on ringing with bursts or acoustic decay measurements. Do not use touch or chest vibration as a measurement.

The optional Hann envelope smoothly rises from zero to a maximum halfway through the burst, then returns to zero. This reduces the abrupt transitions of a rectangular burst. The waveform preview shows the envelope applied to the signal.

With the option off, the burst uses a rectangular envelope. Its sudden transitions introduce a broader spectrum and may sound like clicks. Both modes can help with listening comparisons, but keep the chosen mode unchanged during an A/B test.

This is a general-purpose windowed burst, not a claim of compliance with a CEA or CTA loudspeaker test standard.

Set the low cutoff below the frequencies you want to explore and the high cutoff above them. The default 20–200 Hz band is a starting point. Both filters have gradual slopes, so the cutoffs are not hard limits.

The high cutoff must be greater than the low cutoff. If the values cross, playback stops and Start becomes unavailable until the range is valid.

Compare the same noise band with AVAA active and inactive. Listen for changes in bass balance and persistent resonances. Noise is useful for an overall impression; bursts isolate individual frequencies more clearly.

The burst and sine displays show the generated waveform. They are not recordings of what happens in your room.

The noise curves show a theoretical, normalised source spectrum after the highpass and lowpass filters. Pink noise includes its nominal spectral tilt. The horizontal axis is logarithmic, from 10 Hz to 1 kHz; the vertical axis is relative level from 0 to −48 dB. Each curve is normalised to its own peak.

Moving the output-level slider changes playback gain, not the normalised curve. Neither graph shows sound pressure level, room frequency response or RT60. Those require a measurement microphone and suitable software.

Burst duration = oscillations ÷ frequency. At 63 Hz, 10.5 cycles last about 167 ms. With a 1-second pause, the next burst starts about 1.167 seconds after the previous one. Browser scheduling is intended for listening tests, not precision timing measurements.

AVAA placement should target locations with strong sound-pressure build-up. Rigid corners are useful starting points, often including corners behind the speakers. Try alternative positions and follow the clearance and installation instructions for your model.

Listen for reduced persistence of low-frequency ringing. The change depends on the frequency, room, placement and listening position; a tone is not guaranteed to disappear. A smaller or less obvious change does not by itself prove a fault.

The generator’s frequency range is not the specification of every AVAA model. Check the operating range in your unit’s manual before interpreting a test.

Read PSI Audio’s placement guidance ↗

No sound? Press Start, check the selected output and audio interface, and confirm that the tab and operating system are not muted. Test the normal playback path at a low level. If needed, reload the page and try an up-to-date browser.

No clear AVAA difference? Check that the unit is active, the frequency is relevant to your room and within the model’s range, and the placement is suitable. Compare several frequencies and positions. A microphone measurement can reveal changes that are difficult to judge by ear.

Distortion or clicks? Lower the playback level. Rectangular bursts have abrupt edges; try the windowed option. Avoid frequencies your speakers cannot reproduce cleanly.

Playback stops when leaving the tab? This is intentional. Press Start again when you return. Changing signal type also stops playback. Press Escape while using the tool to stop the current signal.

For a useful comparison, keep all settings fixed, reduce background noise and repeat the same active/inactive sequence. Finish by listening to familiar music at your usual working level.