Model: Educational toy. Base (left) prefers high frequency; Apex (right) prefers low frequency.
The red line marks the characteristic place. The green curve is the envelope. The blue curve is instantaneous displacement.
Sound: Click Play tone once to allow audio in your browser. Then frequency/intensity sliders will update the tone live.
Safety: Audio output depends on your system volume. Start with low volume. This demo caps gain, but please be cautious.