A / BONE CONDUCTION
Bone conduction
Ear canal remains unobstructed, but contact pressure, efficiency and vibration leakage must be measured.
ARCHITECTURE COMPARISON
There is more than one way to listen.
B / AIR CONDUCTION
Open-ear air conduction
Mature miniature speakers can avoid vibration pressure, but acoustic leakage and bass response remain design trade-offs.
C / HYBRID
Hybrid approach
Potentially flexible audio, at the cost of complexity, mass, power and tuning.
Illustrative BOM — not supplier quotes
All values are illustrative USD/unit planning ranges, not verified current market prices. No tooling, NRE, certification, logistics or margin included.
| Component | Low | High |
|---|---|---|
| Bone-conduction transducer / 骨传导振子 | $3.00 | $12.00 |
| Bluetooth SoC / 蓝牙主控 | $3.00 | $9.00 |
| Audio driver / 音频驱动 | $0.50 | $3.00 |
| MEMS mic / 麦克风 | $0.30 | $1.50 |
| Battery / 电池 | $1.50 | $5.00 |
| USB-C and protection / 充电接口 | $0.50 | $3.00 |
| PCB and antenna / 电路板与天线 | $2.00 | $7.00 |
| Spine and pads / 外壳与软垫 | $3.00 | $10.00 |
| Assembly and testing / 装配测试 | $3.00 | $9.00 |
| Concept subtotal | $16.80 | $59.50 |