Ultrasonic + Haptics Device Test
(18–22 kHz)

Speaker/microphone test at 18–22 kHz + vibration test.
⚠️ High frequencies may be audible to children/animals. Start with low volume.

1) Ultrasound Generator (Speaker)

Ultrasound Volume
0.08
Tip: 0.05–0.10 is usually enough.
Output: stopped

2) Vibration (Modes)

Checking Vibration API support and providing an Audio Rumble alternative.

Vibration API (Real Vibration Motor) …
On iPhone (iOS Safari/Chrome) it usually doesn't work — Apple doesn't implement navigator.vibrate().
Audio Rumble (Through Speaker) works on iPhone too
Rumble Strength
0.12
This may be audible (low frequency). Place your phone on a table for better 'feel'.

3) Analyzer (Microphone + Frequency Purity)

Level Threshold (0–255)
50
Purity Threshold (%)
55
Reception: stopped
Waiting…
Purity is the proportion of energy in a narrow band around the frequency compared to the nearby environment. If 20–22 kHz are poor — most often this is due to speaker/microphone/noise suppression limitations.

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