AI hearing glasses from Boston startup Legato went on sale in the US on 1 October 2026. Called Legato Frames, they look like ordinary prescription eyewear but hide a hearing aid in the arms. An on-board AI model picks voices out of background noise and plays them through small open-ear speakers, so nothing sits in the ear. Prices start at $999.
Legato is aiming at the millions of adults who struggle in noisy restaurants but never buy a hearing aid because of cost, comfort or stigma. The company’s pitch is that people already wear glasses all day, so hearing help should come with them. The frames have no cameras and record nothing.
This article covers what Legato Frames are, how the AI works, the full specifications from the owner’s guide, how they are regulated, what they cost against rival AI hearing glasses from EssilorLuxottica and Meta, who is behind the company, and who should consider buying a pair.
Table of contents
- What Legato’s AI Hearing Glasses Are
- How the AI Hearing Glasses Work
- Full Specifications of Legato’s AI Hearing Glasses
- How AI Hearing Glasses Are Regulated
- Independent Testing of the AI Hearing Glasses
- Legato vs Other AI Hearing Glasses
- Price, Insurance and Where to Buy
- The Team and Money Behind Legato
- What These AI Hearing Glasses Cannot Do Yet
- Should You Buy AI Hearing Glasses?
- AI Hearing Glasses FAQ
- References and Further Reading
What Legato's AI Hearing Glasses Are
Legato Frames are over-the-counter hearing aids built into eyeglass frames. The company calls them “the world’s first AI-based hearing glasses”.
Three frame styles
Legato sells three designs. Harmony is a rectangular frame in matte black, offered in medium or wide. Symphony is a narrower panto shape, also in matte black. Aria is a tortoiseshell frame in medium width, which the launch announcement describes as an acetate-and-metal browline design. Every pair uses Pentax lenses and accepts almost any prescription, including progressives and readers, or no prescription at all.
Who they are for
The glasses are intended for adults aged 18 and over with perceived mild to moderate hearing loss. No hearing test or appointment is needed to buy them. Legato’s FAQ describes the target buyer as someone who leans in, asks people to repeat themselves or avoids loud restaurants.
What Legato means by “AI”
The AI in these AI hearing glasses is a neural network that runs on the frame itself. It is trained to tell speech from everything else, then boosts the speech and lets the rest pass at its normal level. It is not a chatbot, an assistant or a camera-based system like the smart glasses sold by Meta.
How the AI Hearing Glasses Work
Legato calls its technology SpeechSense AI and describes it in four steps on its website.
Sense, isolate, tune, play
Microphones in the frame pick up the room, including the voices you want and the noise you do not. An on-device neural network, “trained to tell speech from non-speech”, isolates the speech in real time. The system then amplifies that speech to suit mild to moderate hearing loss. Finally, open-ear speakers play it back to the wearer.
Why not just turn everything up
Traditional hearing aids often rely on directional microphones, which work well in quiet rooms but can struggle in a busy restaurant. Turning everything up makes a noisy room louder, not clearer. Legato’s approach is to separate voices from noise first, which co-founder Mehul Trivedi says avoids the “cognitively draining listening experience” of some hearing aids.
Sound that stays with the wearer
Open-ear speakers raise an obvious question: can everyone else hear it too? Legato says a dual-speaker system directs sound to the wearer while cancelling sound that escapes, reducing it by 99% just a few inches from the ear, according to TechCrunch. The ear canal stays open, so wearers still hear the world around them naturally.
Privacy by design
All processing happens on the glasses. Legato says the frames have no cameras, record nothing and store no audio, and that hearing data exists only to tune the frames. That is a deliberate contrast with camera-equipped smart glasses and with the always-listening trend we covered in our look at Apple Watch’s new AI features.
Full Specifications of Legato's AI Hearing Glasses
Legato publishes a 67-page owner’s guide with detailed technical figures. Here are the numbers that matter.
| Specification | Legato Frames |
|---|---|
| Price | $999 (Harmony, Symphony), $1,099 (Aria) |
| Weight | From 27 g without lenses; from 34 g with lenses |
| Battery | 10+ hours of hearing assistance (10 to 12 hours in the launch release); over 30 hours muted |
| Charging | Wireless pad; full charge about 2 hours; 30 minutes gives about 2 hours |
| Connectivity | Bluetooth 5.3; calls and music on iPhone and Android |
| Water and dust | IP54 (dust and splash resistant, not for swimming or showers) |
| Sound profiles | Two presets in the app: Flat and Treble |
| Controls | Volume rocker on the left arm; mute and call button on the right arm |
| Latency | 7.2 milliseconds |
| Maximum output (OSPL90) | 109.5 dB SPL |
Weight and battery claims differ slightly
Legato quotes two weights: “starting at 27 grams” without lenses on its website and “as little as 34 grams with lenses” in its launch release. Battery figures vary too, from “10+ hours” in the FAQ to “10-12 hours” in the release. Prescription lenses add weight, so the real figure depends on your eyes.
Controls and the app
Most adjustments happen on the frame. A free companion app for iOS and Android adds a left-right balance control, a setting for how your own voice sounds and the choice between the two hearing profiles. Flat gives an even boost across frequencies, while Treble adds extra boost to the mid and high frequencies where speech clarity lives.
How AI Hearing Glasses Are Regulated
Since October 2022, US adults with perceived mild to moderate hearing loss have been able to buy hearing aids without a prescription or a fitting. The Food and Drug Administration set rules for that over-the-counter category, and Legato Frames sit inside it.
Legato’s FDA listing
The FDA’s device registration database lists the maker, Legato Audio, Inc., under product code QUG: an over-the-counter air-conduction hearing aid with wireless technology, a Class II device under regulation 21 CFR 874.3305. The listing, dated 19 March 2026, names four models: Symphony narrow, Harmony medium, Harmony wide and Aria medium. Legato describes the frames as “FDA-regulated” OTC hearing aids, rather than using the “FDA-cleared” wording that EssilorLuxottica and Meta use for their products.
The FDA’s performance limits
The 2022 rule caps what an over-the-counter hearing aid can do, to protect users who fit it themselves. Legato’s published figures sit inside every limit we checked.
| Measure | FDA limit for OTC hearing aids | Legato Frames |
|---|---|---|
| Maximum output | 111 dB SPL (117 dB SPL with input-controlled compression) | 109.5 dB SPL |
| Latency | 15 ms or less | 7.2 ms |
| Distortion | 5% or less (harmonic distortion plus noise) | Under 1% (harmonic distortion) |
| Self-generated noise | 32 dBA or less | 30.2 dB SPL equivalent input noise |
| Frequency range | Down to 250 Hz or lower, up to 5 kHz or higher | 200 Hz to over 5,000 Hz |
The noise and distortion rows are measured in slightly different ways in the rule and the guide, so read them as indicative. The guide also lists a full-on gain of 20 dB at a 50 dB input.
What the owner’s guide warns
As the rule requires, the guide tells buyers to see a doctor first if they have ear pain, fluid from the ear, sudden or one-sided hearing loss, or ringing in one ear. It also warns not to wear the frames while driving if they limit peripheral vision, and reminds users that a hearing aid “will not restore normal hearing”.
Independent Testing of the AI Hearing Glasses
Legato’s strongest performance claim comes from HearAdvisor, an independent lab that tests hearing devices across dozens of sound environments and publishes an overall SoundScore.
A 4.6 out of 5 SoundScore
In May 2026 testing, Legato Frames earned a SoundScore of 4.6 out of 5, which the company says places them among the top 10 devices HearAdvisor has tested, including prescription hearing aids that cost thousands more. Legato’s website adds that the score is above the average for prescription hearing aids.
How that compares
EssilorLuxottica’s first-generation Nuance Audio glasses scored 4.1 out of 5 in 2025, according to HearingTracker, which notes that the lab has since changed its scoring method. The two scores were produced under different versions of the test, so they are not a clean head-to-head.
HearAdvisor SoundScore out of 5 (bar length = score as a share of 5)
The bar widths are 4.6 ÷ 5 = 92% and 4.1 ÷ 5 = 82%. HearingTracker says HearAdvisor hopes to test the newer Nuance Audio Plus soon.
Legato vs Other AI Hearing Glasses
Legato is not alone. In the ten days before its launch, two of the biggest names in eyewear and smart glasses made their own moves into AI hearing glasses.
EssilorLuxottica’s Nuance Audio Plus
The maker of Ray-Ban launched its original Nuance Audio glasses in the US in April 2025 and its second generation, Nuance Audio Plus, in late September 2026. HearingTracker reports that Nuance Audio Plus starts at $829, with the original now from $699. It uses directional microphones and beamforming rather than a speech-separating neural network, runs about 10 hours, and supports calls and streaming only on iPhone. EssilorLuxottica says Nuance is sold in 14 countries and more than 18,000 stores.
Meta’s Hearing Enhancement
At Meta Connect in September 2026, Mark Zuckerberg announced Hearing Enhancement, a $149.99 software upgrade that turns some Meta smart glasses into an FDA-cleared over-the-counter hearing aid. Users take a guided hearing test in the app and the glasses tune amplification to the result. Meta says it arrives later this year with a 30-day trial, HearingTracker reports, though compatible frames had not been listed.
Earbuds already do it
Apple added a hearing aid feature to AirPods Pro 2 in 2024, and HearingTracker says Samsung’s Galaxy Buds feature will follow in late 2026. For people who do not wear glasses, earbuds may be the cheaper route.
| Product | Starting price | Sound approach | Phone streaming |
|---|---|---|---|
| Legato Frames | $999 | On-frame neural network separates speech | iPhone and Android |
| Nuance Audio Plus | $829 | Directional microphones and beamforming | iPhone only |
| Nuance Audio (first generation) | $699 | Directional microphones | Not offered |
| Meta Hearing Enhancement | $149.99 add-on, plus compatible glasses | Amplification tuned by an in-app hearing test | Built into the glasses |
Where Legato wins and loses
On price alone, Legato’s AI hearing glasses are the most expensive dedicated option. On paper, they offer the strongest independent test score, Android support and an AI approach aimed squarely at noisy rooms. They do not offer a hearing test or fine-grained personalisation: just two presets, volume and balance.
Starting prices of dedicated hearing glasses in the US, in dollars (bar length relative to $1,099)
Each bar is the price divided by $1,099: 999 ÷ 1,099 = 90.9%, 829 ÷ 1,099 = 75.4% and 699 ÷ 1,099 = 63.6%. Nuance prices depend on the lenses chosen, and Meta is left out because its $149.99 fee is an add-on to glasses bought separately.
Price, Insurance and Where to Buy
What you pay
Harmony and Symphony cost $999 and Aria costs $1,099 on Legato’s store. A spare charging pad is $149. Legato Care, an optional $199 plan, extends the frame warranty from one year to three, covers accidental damage at $49 per repair and includes one replacement for loss or theft. Every pair comes with a 45-day money-back guarantee and lifetime support from Legato’s US-based audiologists.
Online now, opticians soon
The frames are on sale now at Legato’s website, with prescription orders arriving in five to ten days. TechCrunch said they can also be bought through eye care providers, but Legato’s own release says they “will soon be offered” there, and HearingTracker reports the clinic rollout starts in late October and runs to the end of the year.
The optician route
HearingTracker reports that participating clinics will offer a free hearing screening to patients aged 50 and over during their annual eye exam. The first practices are in New York, California, Texas, Illinois, Missouri, Mississippi, Maine, North Dakota, Tennessee and Arizona. Bought through a clinic, the frames may qualify for vision insurance, depending on the plan. HearingTracker notes that Legato has not said who will carry out those screenings.
The Team and Money Behind Legato
Two Bose veterans
Legato was founded in 2024 by Mehul Trivedi, its chief executive, and Steve Romine, its president. Trivedi led the creation of Bose Frames audio glasses, then ran smart eyewear work at EssilorLuxottica, where he worked on the Ray-Ban Meta glasses. Romine launched Bose SoundControl hearing aids and later ran the consumer and retail business at hearing care company Audicus.
$12 million and four patents
Legato emerged from stealth on 26 August 2026 with $12 million from Neotribe Ventures, Listen and Village Global, TechCrunch reported. Most has gone into product development and marketing. Legato lists three US utility patents and one design patent covering the frames.
Why the founders think the market is underserved
Around 50 million US adults have hearing loss, yet Legato says 80% of those who could benefit from hearing aids do not use them. Its release cites a 2024 Lancet Commission meta-analysis of more than 126,000 people, which found hearing device users had nearly 20% lower risk of cognitive decline and 17% lower risk of dementia than people who did not adopt one. “Our goal is to make hearing as ubiquitous as vision,” Trivedi told TechCrunch.
What These AI Hearing Glasses Cannot Do Yet
Legato’s launch materials are detailed, but a few gaps matter for buyers.
No hearing test or personal fitting
Legato’s AI hearing glasses use what the owner’s guide calls “a preset fitting strategy”. You choose between two sound profiles and adjust volume and balance, but the frames are not tuned to a measured hearing test, the way Meta says its Hearing Enhancement feature will be or the way an audiologist programs a prescription hearing aid. For people whose hearing differs a lot between frequencies, that may limit the benefit.
A battery shorter than a waking day
Trivedi told TechCrunch the product “lives on people for 16 hours”. Legato rates the battery at 10 or more hours of hearing assistance, so a full day of active listening would need a top-up. Muting the hearing function when it is not needed stretches the battery past 30 hours, Legato says, and a 30-minute charge adds about two hours.
Rated hours of hearing assistance against a 16-hour day of wear (bar length relative to 16)
The bars are 12 ÷ 16 = 75% and 10 ÷ 16 = 62.5%. Real battery life depends on volume, streaming and how often the hearing function is muted.
Open questions on the clinic rollout
HearingTracker has asked Legato who will carry out the screenings in eye clinics and whether hearing care professionals will be involved; the company had not said at launch. Vision insurance coverage will also vary by plan, so buyers should check before ordering through a clinic.
Camera-free by design
Unlike smart glasses that use computer vision to identify objects or read signs aloud, Legato Frames have no camera at all. That rules out those features, but it also means the people around the wearer never have to wonder whether they are being filmed.
Should You Buy AI Hearing Glasses?
Good candidates
You already wear glasses most of the day, you struggle mainly in noisy places, you dislike the idea of something in your ears, and you want calls and music through the same device. Android users have fewer hearing-glasses choices, which favours Legato.
Think twice if
Your hearing loss is more than moderate, it came on suddenly or affects one ear, or you want a professional fitting. Those cases call for an audiologist, not an over-the-counter device. Price-sensitive buyers should compare Nuance Audio, or wait for Meta’s software upgrade if they already own compatible glasses.
What businesses can learn
Legato is a useful example of on-device AI: a small model doing one job, in real time, without sending data to the cloud. That design choice answers privacy concerns before customers raise them. If you are weighing where AI could help your own products, our AI strategy team can help you choose between on-device and cloud approaches, and our AI and machine learning services can build it.
AI Hearing Glasses FAQ
What are AI hearing glasses?
AI hearing glasses are eyeglass frames with a built-in hearing aid that uses an AI model to pick out voices from background noise and deliver them through open-ear speakers in the arms.
How much do Legato Frames cost?
They start at $999. The Aria style costs $1,099. Lenses, including prescription lenses, are part of the order.
Do Legato Frames need a prescription or hearing test?
No. They are sold over the counter to adults 18 and older with perceived mild to moderate hearing loss. A vision prescription is needed only if you want prescription lenses.
Do Legato Frames record conversations?
No. Legato says the frames have no cameras, process sound on the glasses and do not record or store audio.
Can I use them with Android?
Yes. Legato Frames stream calls and music on both iPhone and Android, and the companion app runs on both.
References and Further Reading
Hearing tech startup Legato launches its AI hearing glasses (TechCrunch)
Legato emerges from stealth with $12M and a peek at its AI hearing glasses (TechCrunch)
Legato Frames are now available in the U.S. (GlobeNewswire release via Yahoo Finance)
Legato Frames owner’s guide (Legato, PDF)
Legato Frames OTC Hearing Aid Glasses Launch From $999 (HearingTracker)
EssilorLuxottica Launches Nuance Audio Plus Hearing Glasses (HearingTracker)
Meta Smart Glasses to Get FDA-Cleared OTC Hearing Aid Feature (HearingTracker)
Legato Frames Now Available in the US (The Hearing Review)
Establishing Over-the-Counter Hearing Aids, final rule (Federal Register via GovInfo)
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