Phonak · Rechargeable · Bluetooth · AI sound
Phonak Audéo Infinio Sphere Hearing Aids
Phonak’s most advanced hearing aid — a dedicated AI chip separates speech from background noise in real time, keeping conversation clear in the places that used to be hardest.
★★★★★ Rated 5-star by 500+ patients
Why patients choose the Sphere
Built for the moments other hearing aids give up on
Hears through the noise
The Sphere’s AI chip picks voices out of busy rooms in real time — restaurants, parties, family gatherings.
Hands-free calls & TV
Streams calls, TV and music straight to both ears by Bluetooth — answer the phone without touching it.
All-day battery
Up to 34 hours from one overnight charge — among the longest of any hearing aid we fit.
Fitted by specialists
Prescription-fitted with real-ear measurement, then fine-tuned around your life at follow-ups.
Choose your technology level
Which Sphere is right for you?
Same body, same battery, same Bluetooth — the difference is how much artificial intelligence works on background noise for you.
Audéo Infinio Sphere i90
Five conversations at a noisy dinner table and you can follow any of them — the AI separates an unlimited number of voices in real time, as it happens.
The tech: Real-time AI speech separation (unlimited voices) · every mic direction · up to 34 hours per charge
£3,895 a pair
Audéo Infinio Sphere i70
Cafés, family meals, groups of three to five — strong, reliable support in the noise most weeks actually contain.
The tech: Strong group-setting support (3–5 speakers) · same 34-hour battery
£3,695 a pair
Audéo Infinio i50
Clear speech focused in front of you — ideal for one-to-one conversation and small, calm groups.
The tech: Fixed directional focus · small groups (1–3) · rechargeable
£3,395 a pair
The full specification
Phonak Audéo Infinio Sphere at a glance
Choose your look
Seven finishes, one remarkable hearing aid
Tap any finish to see it — colour-matched from Phonak’s official range.
Match it to your week
Tell us what your days look like
Restaurants, parties, group classes — you’re in lively noise several times a week and want to catch every word.
Our recommendation: Audéo Infinio Sphere i90
Coffee with friends, family dinners, shops and appointments — everyday noise, handled comfortably.
Our recommendation: Audéo Infinio Sphere i70
Home, television, one visitor at a time — effortless clarity without paying for AI you won’t use.
Our recommendation: Audéo Infinio i50
Not sure where you fit? That’s exactly what your £59 assessment is for — and you can trial before you decide.
“When a patient tells me their biggest struggle is the restaurant, the family dinner, the group of friends talking over each other — the Sphere is the one I reach for. The i90’s AI genuinely does something no other aid we fit can do in that situation. And as always: you’ll trial it in your own life first, and if a simpler level covers your world, that’s exactly what we’ll tell you.”
Priyanka Joshi — BSc (Hons) Audiology, RHAD · Lead Audiologist, The Hearing SpecialistSphere questions
Good to know
What is included in the price?
Every price includes a full hearing assessment, prescription fitting with real-ear measurement, all follow-up adjustments, a 4-year warranty and 4 years of unlimited aftercare. Prices are for a pair — single aids from £798.
How long does the battery last?
Up to 34 hours from a single charge — charge them overnight like your phone and they'll comfortably run the full day and evening.
What's the difference between the i90, i70 and i50?
The body and battery are identical. The difference is noise handling: the i90's AI separates unlimited voices in real time, the i70 gives strong support in groups of 3–5, and the i50 focuses on speech in front of you for quieter settings.
Can I try it before I buy?
Yes — after your assessment we fit the Sphere and you trial it in your daily life before deciding, including switching levels if your first choice isn't the right fit.
Hear it, wear it, then decide
Book a £59 assessment at Wimbledon, Teddington, Wallington or Addiscombe — try the Sphere and find your fit with no pressure and no obligation.