The $300 Earbud Trap (Why Calls Sound Terrible)
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Bluetooth earbuds like AirPods use two separate audio profiles: a high-fidelity mode for music (which introduces ~500ms latency) and a hands-free profile for calls that caps bandwidth at 16 kHz. The switch to the hands-free profile during calls is an intentional engineering trade-off — low latency is prioritized over audio quality because a half-second delay is more disruptive to conversation than reduced sound fidelity.
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