Diaphragm Materials TRIZ Cases
- Sound apparatus and chair, vehicular seat, and vehicular apparatus each including the sound apparatus
See how a piezoelectric vibration device with guide protrusion enables directional stereophonic
- Seat Sound Enclosure for Stereo Audio and Tactile Feedback
An enclosure-mounted vibration member boosts low-pitched sound and delivers tactile feedback in vehicle seats without adding more speakers.
- Detachable Vehicle Speaker Enclosure for Higher Low-Frequency SPL
A detachable coupling and stacked speaker enclosure raise low-frequency sound pressure while keeping vehicle audio installation compact.
- Vehicle Speaker Enclosure Layout for Higher SPL and Stereo Sound
Piezoelectric vibration and heat-dissipating enclosure holes raise vehicle speaker SPL, especially at low frequencies, without adding more speakers.
- Vehicular Speaker Enclosure for Stronger Low-Frequency Sound
An integrated vibration member and enclosure boosts low-frequency sound pressure in vehicle speakers while limiting size growth for stereo output.
- Lead-Free Piezoelectric Vibration Driving With Unipolar AC
A BT-based lead-free piezoelectric driver uses 0 V-or-higher unipolar AC to enable self-poling while maintaining sound pressure and reducing lead risks.