ENC Noise reduction open ear earbuds“Open‑ear” earbuds (also called “open‑fit”, “semi‑in‑ear”, or “conduction type” depending on design) refer to earbuds that do not form a tight seal inside your ear canal, or sometimes sit outside the ear canal (or use bone/air conduction). Because they don’t block the ear canal completely:You remain aware of ambient sounds (traffic, announcements, voices) — useful for safety and situational awareness.You’ll get less passive noise isolation (i.e. less sound blocked just by physical barrier) compared to in‑ear sealed earbuds.The trade‑off is more comfort (less “in‑ear pressure”) at the cost of letting more noise in.