Most models offer Active Noise Cancellation (ANC) to reduce external noise and a Transparency/Aware mode that passes outside sound back in. Some also include Adaptive Audio that blends ANC and Transparency for situational awareness. Sleep-focused options more often use noise masking rather than ANC.
Listings commonly note sweat- and water-resistance. Examples in this set include IPX4 (splash/sweat resistant) and IP54 (dust plus sweat/water resistant), depending on the model.
Many earbuds include multiple microphones with voice-targeting or noise-rejecting processing, dual-beamforming or directional mic arrays to reduce wind and background noise, and software features that enhance call clarity.
Sleep-focused designs rely on passive sealing (special tips or cushions) and noise masking—playing steady background sounds—to reduce disruptions. ANC, by contrast, uses microphones and processing to actively measure and cancel external noise.
Transparency/Aware modes mix outside sound back in so you can hear your surroundings. Conversation Awareness lowers playback when you’re speaking to someone nearby, and Adaptive Audio blends ANC and Transparency to provide situational awareness as conditions change.
