What are smart headphones and hearables?

You may well have already heard of ‘wearable’ technology, but you’re probably less likely to have encountered the term ‘hearable’. Wearable technology refers to smart devices that you wear, such as smartwatches, but hearables – you guessed it – are smart devices that you can listen to.

Hearables are still a relatively new class of products, and what exactly makes something a hearable is still not very rigidly defined. Broadly, it means a pair of headphones with added smart features - usually fitness tracking or a built-in voice assistant that you can use to control your smartphone.   

Over the past 20 years, we’ve seen the idea of a ‘personal computer’ evolve from something you might have on your desk at work to a pocket-sized device that many people carry around with them constantly. Some manufacturers are promoting hearables as the next step as we weave computers ever closer into our daily lives.

Hearables are starting to move into the mainstream, but the concept has been around for a while. The first fitness-tracking headphones were released in 2013, but now that voice-assistant technology is starting to take off the case for smart headphones is becoming stronger. You can see the products we’ve tested in the table below.

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What can hearables do?

Hearables are usually in-ear headphones, as these are easier to take around with you everywhere than bulkier on-ear and over-ear models. They will connect to your smartphone via Bluetooth, just like other wireless headphones.

Headphones have long included microphones, allowing you to make voice calls while wearing them. Hearables take this a step further by syncing with the voice assistant on your phone, such as Apple’s Siri, Amazon’s Alexa and Google’s Assistant. This will allow you to make calls simply by speaking the request aloud. You could also dictate a text message, all without getting your phone out of your pocket or bag.



Many hearables also include fitness-tracking features. Built-in GPS tracking, step counters and a heart-rate monitor will give you the equivalent functions of most fitness trackers. Some hearables also have built-in memory, allowing you to store music on them and leave your smartphone at home when going out for a run.

Some hearables rely completely on your smartphone to do all the computing work – they are just a way of controlling your smartphone without getting it out. Others, such as the models with on-board music players, can be used without a smartphone but need the phone to access the full range of smart features. A small minority of models include built-in internet connection and are designed to be used completely independently of a smartphone.

The benefits of hearables

If you’ve ever been annoyed by someone walking down the road engrossed in their smartphone, a hearable future might appeal to you. Tasks we currently use smartphone screens for, such as navigation, could become voice directed through hearables instead – far less distracting and keeping our vision free.

You might be surprised to learn that hearables may actually be better at recording your heart rate than wrist-based monitors. The idea for putting a heart-rate monitor in your ear was originally for purely practical reasons. The location of blood vessels means it’s easier for the sensor to get a reliable reading there.

Hearables could also make it easier for people to interact with their smartphones. Many people prefer the idea of voice commands to tapping away at confusing buttons. Because hearables feature microphones, they could also be used to boost hearing – think a hearing aid with added features.

Into the future

Currently much of the talk around hearables is around their fitness-tracking features. However, one day hearables could be the solution to many tasks you currently carry out on your smartphone. Voice-assistant technology keeps getting better, so it’s not at all far-fetched to imagine a world where people check the news headlines, navigate their way around and order taxis all without getting their phone out.

Having a smart earbud in your ear opens up the possibility of real-time translation. This is actually already a feature on the Google Pixel Bud headphones, but in future it could become widespread.

Hearables will also likely get smarter when it comes to working out which sounds you want to be listening to, and which can be filtered out. For example, this could be used to turn down the background noise in a cafe and let you focus on your conversation.

Currently, voice assistants are getting a lot of attention from tech companies, but it’s not always practical to speak aloud to your headphones. It’s likely to be a fair way off yet, but it has been suggested that future in-ear headphones could also include a sensor to monitor your brain activity, giving the possibility of controlling your devices by merely thinking about doing it.