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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want active noise cancellation that actually quiets a commute and you like the idea of a bundle that also covers wired open-ear listening, choose Avantree E191; if you need marathon battery, a lightweight all-day open fit, and a splash-resistant build for workouts, choose Sennheiser ACCENTUM Open.
• Avantree E191 — biggest strength: Hybrid ANC rated to cut up to 24dB of environmental noise, paired with an open-ear fit and in-line controls for calls, music and voice assistant.
• Avantree E191 — biggest trade-off: 6 hours per charge (24 hours with the case) is modest, and the bundle's focus on noise cancelling means it's the busier, more task-oriented kit of the two.
• Sennheiser ACCENTUM Open — biggest strength: Up to 28 hours of playback with the case, IPX4 splash resistance, multi-point pairing and a breathable open-ear design built for all-day wear.
• Sennheiser ACCENTUM Open — biggest trade-off: There is no noise cancelling at all — the open fit deliberately lets the world in.
• Who each is for: Avantree E191 suits commuters who want active noise reduction and a wired open-ear option in the same box; Sennheiser ACCENTUM Open suits people who want light, long-lasting earbuds they can wear from morning to night.
The Avantree E191 is the more technically ambitious pick of the two, and the reason is hybrid ANC. Avantree rates it to block up to 24dB of environmental noise, which is the single biggest functional difference between these products. In practice, that's the spec that matters on a train platform, in a busy office, or on a noisy street: the earbuds are actively working to reduce the drone around you rather than just letting it wash over your music.
The design is open-ear, with a rounded-tip shape and a plastic enclosure in orange. That's an unusual combination — noise cancelling and an open fit in the same product — and it's worth understanding what it means. You get the ear-fatigue relief of earbuds that rest outside the ear canal instead of inside it, plus a layer of active noise reduction on top. Avantree also bundles a wired open-ear pair and microphone (the Clan N1), so you're covered for situations where you'd rather not run Bluetooth at all.
Buy it if you're a commuter who wants real noise reduction, a private listen that still lets you hear traffic, and a bundle that adds a wired option. Skip it if you need maximum battery life or you want earbuds you can sweat in — there's no water-resistance rating in the specs.
Sennheiser ACCENTUM Open: Who It's For
The Sennheiser ACCENTUM Open takes the opposite approach: it doesn't try to cancel the world, it's designed around living in it. The open-fit design keeps you aware of your surroundings, and Sennheiser's tuning is built to blend with your environment rather than wall you off from it. For anyone who finds sealed in-ear designs too isolating, too much pressure, or simply too big to sit securely, this is the whole point of the product.
Battery is where it runs away with things. Sennheiser lists up to 28 hours of playback with the compact charging case, and a charge time of just 1 hour. That combination — long runtime, short top-up — is what makes these genuinely all-day earbuds rather than a commute-only pair. The fit is described as lightweight and ergonomic with a breathable shank, using angled ear hooks and wings to stay put without pressing into the ear canal. Item weight is 2.88 ounces for the package.
Feature-wise it's the more modern set. Bluetooth 5.3, touch controls, smart pause that stops playback when you remove an earbud, multi-point pairing so you can jump between two devices, and a one-earpiece mode if you only want one side in. The 11mm dynamic drivers support SBC and AAC, with dual beamforming mics and AI-based noise reduction for calls. There's also IPX4 splash and sweat resistance, which makes these viable as workout or running earbuds — something the Avantree pair can't claim from the specs. You get the earbuds, charging case and a USB-C cable in the box, plus a 1-year manufacturer warranty.
Buy it if you want long battery, a light open fit for hours at a time, and a set you can wear while sweating. Skip it if you specifically need active noise cancellation — the noise control field is simply "None."
• Best for noise cancelling → Avantree E191. Hybrid ANC rated to reduce up to 24dB of environmental noise. The ACCENTUM Open has no noise cancelling.
• Best for battery life → Sennheiser ACCENTUM Open. Up to 28 hours with the case versus 24 hours on the Avantree, and a 1-hour charge time versus 24 hours.
• Best for workouts and sweat → Sennheiser ACCENTUM Open. IPX4 splash resistance; the Avantree E191 has no water-resistance rating listed.
• Best for commuting in loud environments → Avantree E191. Active noise reduction plus an open fit that still lets you hear what's around you.
• Best for all-day comfort → Sennheiser ACCENTUM Open. Lightweight ergonomic build with a breathable shank and angled ear hooks.
• Best for device switching → Sennheiser ACCENTUM Open. Multi-point pairing and one-earpiece mode; Bluetooth 5.3 versus Bluetooth 4 on the Avantree.
• Best for wired flexibility → Avantree E191. The bundle includes wired open-ear earbuds and a microphone alongside the wireless ANC pair.
• Best for hands-on control fans → Avantree E191. In-line buttons for volume, tracks, calls and voice assistant — no touch guessing.
In my opinion, the Sennheiser ACCENTUM Open is the better buy for most people. Up to 28 hours of playback, a 1-hour charge, IPX4 protection, Bluetooth 5.3 with multi-point pairing, smart pause and one-earpiece mode add up to a more flexible, more wearable product — and the open-fit comfort story is exactly what this category is about. I'd only steer you to the Avantree E191 if hybrid ANC is non-negotiable for you, because that up-to-24dB noise reduction is something the Sennheiser simply doesn't do, and the bundled wired pair is a genuinely useful extra. Decide which of those two things you actually need, and the choice makes itself.
FAQ
what is hybrid anc earbuds
what are hybrid anc earbuds
They're earbuds that combine feedforward and feedback noise cancellation — an outer mic catches ambient sound and an inner mic checks what remains near your ear. In this comparison, only the Avantree E191 offers it. That makes it the pick for noisy commutes, while the Sennheiser suits listeners who want to stay tuned in to traffic and conversation.
what is anc earbuds
ANC stands for active noise cancellation: the earbuds generate sound to counteract background noise. On the Avantree E191 that's rated up to 24dB. The Sennheiser ACCENTUM Open lists noise control as "None," relying on its open fit and Sennheiser tuning to blend music with your environment rather than block it.
The Sennheiser ACCENTUM Open, clearly. It's listed at up to 28 hours of playback with the charging case and a 1-hour charge time. The Avantree E191 is listed at 6 hours per charge, 24 hours with the case, and a 24-hour charge time. If runtime matters most, the Sennheiser wins.
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See also: Raycon Fitness Open Ear vs Sennheiser ACCENTUM Open, Sennheiser ACCENTUM Open vs Pupabiflor Bone Conduction Headphones, Sennheiser Accentum vs Puro Sound Labs BT