A mobile terminal handwriting pen integrates an earphone plug into the nib and stores the cord inside the body.
A detection circuit transmits signals through headset lines to identify microphone polarity and ground connections.
A headset uses a movable arm and detector to switch between near-field and open-air audio modes.
Segmented acoustic paths with varying impedance curb resonance peaks while maintaining low-frequency sound pressure characteristics.
Decentralized arbitration on a single-wire serial bus resolves conflicts between communication reliability and system complexity, allowing real-time updates.