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What is Auracast and LE Audio? Why is it considered better than classic Bluetooth?

Kimberley Bradshaw - Head of Online Medical Content for Hearing Aid UK
Written By:
Kimberley Bradshaw

Head of Online Medical Content

Paul Harrison - Audiology Expert at Hearing Aid UK
Medically Reviewed By:
Paul Harrison

Audiology Expert at Hearing Aid UK

Updated and medically reviewed: 1st December 2024
What is Auracast?

What is Auracast and LE Audio?

A brief summary

 

Introduction    |    Why is Auracast better than classic Bluetooth?    |    Streaming with Auracast    |    Auracast and hearing aids    |    Disadvantages of Auracast    |    Conclusion

 

LE Audio and Auracast explained

LE Audio, part of the new Bluetooth 5.2 and 5.3 standards, is a low-power version of Bluetooth specifically designed for streaming audio.

With it comes Auracast, a feature that allows an audio source to broadcast one or multiple audio streams to an unlimited number of receivers, like Bluetooth earbuds or hearing aids

Auracast's low-energy consumption also helps to prolong battery life, ensuring extended usage without interruption. Its user-friendly interface simplifies device pairing and customisation, supporting hearing personalisation.

 

Why is it better than classic Bluetooth?

Bluetooth, introduced in 1999, was created for high-bandwidth wireless data transfer, including audio streaming, though that wasn’t its main purpose. 

In contrast, and when looking deeper into the technology, LE Audio uses the LC3 (Low Complexity Communication Codec).  This means there's a wider range of bit rates and unlimited channels.

When looking at it from a hearing healthcare point of view, these advancements enhance accessibility, providing features like hearing aid support, and making the overall Bluetooth experience more versatile and user-friendly compared to classic Bluetooth technology.

 

What is bit rate, and why is it important?

Bit rate is important because it determines how much information your audio transmits per second. To simplify, if the bit rate is higher, the audio quality will be higher too.  Auracast and LE Audio significantly improve over classic Bluetooth by simply offering better sound quality, lower latency, and enhanced power efficiency.

Whilst classic still Bluetooth delivers good sound quality, switching to LE Audio brings a noticeable difference, thanks to the advanced LC3 codec we mentioned earlier.

 

Streaming audio with Auracast

With Auracast, you can connect to the TV's audio and stream it directly to your headphones or hearing aids, so there's no struggling to hear over the background noise.  LE Audio allows hearing aid wearers, within range of a compatible transmitter, to connect to Auracast broadcasts with the press of a button or via an app.

This technology not only improves audio quality but also reduces power consumption, enabling developers to add more features without affecting battery life.

Big hearing aid brands like Signia and Oticon are already incorporating LE Audio into their hearing solutions, starting the global rollout of Auracast. This innovation looks promising and is set to revolutionise the next generation of hearing aids.

 

Auracast and hearing aids

To clarify, Auracast Bluetooth technology will roll out within the next six or so years in hearing aids.  However, it will represent a significant leap forward, offering enhanced accessibility, and enhancing the hearing aid user experience.

It will also provide crystal-clear sound quality and eliminate background noise.  This technological shift will improve the quality of life for those with hearing loss.

 

Any downsides to Auracast?

Like with all technology, Auracast has a few potential downsides. Compatibility is a concern, as older devices may not support Auracast, requiring users to upgrade to newer hardware. 

While Auracast is designed for low power consumption, some devices might still experience higher battery drain during extensive use.

Security could also be a problem, as the ability to broadcast to multiple devices might raise privacy issues if not properly managed.  For more detailed information on Auracast, watch the video below or visit https://www.bluetooth.com/auracast/

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What is Auracast and Le Audio?

Conclusion

Unlike traditional Bluetooth, which typically connects one device to another, Auracast enables sharing audio with a large audience, such as in public places, schools, or events.

This technology can be used for personal listening, like sharing music with friends, or for broader applications like transmitting announcements in airports.

Auracast enhances accessibility by supporting hearing aids and improving experiences in public venues, making wireless audio sharing more versatile and inclusive.

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Meet Paul Harrison, Audiology Expert at Hearing Aid UK

Paul Harrison is an audiology expert at Hearing Aid UK, with over 20 years of audiology experience and a member of the British Society of Hearing Aid Audiologists Council (BSHAA) between 2015 - 2020.

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Common FAQs about hearing aids and hearing loss

Is this the best model for me?

If you are looking at this page then it is likely that an audiologist has suggested that you purchase this particular hearing aid, so is this the best model for you?

In general, any audiologist will always be recommending to you the model that best suits your needs. Here is a useful check list to make sure that is the case.

  • Audiologist level of knowledge. The audiologist you have seen will hopefully have a wide knowledge of all available hearing aids, however some will only be familiar with a small number of brands and therefore may not really be in a position to know which model is the best for you. It is OK to challenge their recommendation and ask them to justify why this particular brand is the one for you.
  • Do research. Read about the hearing aid that was recommended. Does it seem like it will suit your lifestyle? Does it have more or less features than you need? 
  • Be aware of sales targets. Many high street retailers have specific tie-ins to a particular manufacturer/brand. The hearing aid they have suggested may still be the correct one for you, but do your research so that you know why they might have recommended it.

If in doubt, feel free to give us a call. That's what we're here for.

Do I need one hearing aid or two?

If you have a significant hearing loss in both ears, you should be wearing two hearing aids. Here are the audiological reasons why:

Localisation. The brain decodes information from both ears and compares and contrasts them. By analysing the miniscule time delays as well as the difference in loudness of each sound reaching the ears, the person is able to accurately locate a sound source. Simply put, if you have better hearing on one side than the other, you can't accurately tell what direction sounds are coming from.

Less amplification required. A phenomena known as “binaural summation” means that the hearing aids can be set at a lower and more natural volume setting than than if you wore only one hearing aid.

Head shadow effect. High frequencies, the part of your hearing that gives clarity and meaning to speech sounds, cannot bend around your head. Only low frequencies can. Therefore if someone is talking on your unaided side you are likely to hear that they are speaking, but be unable to tell what they have said.

Noise reduction. The brain has it’s own built in noise reduction which is only really effective when it is receiving information from both ears. If only one ear is aided, even with the best hearing aid in the world, it will be difficult for you to hear in background noise as your brain is trying to retain all of the sounds (including background noise) rather than filtering it out.

Sound quality. We are designed to hear in stereo. Only hearing from one side sounds a lot less natural to us.

What are the benefits of rechargeable hearing aids?

For most people, the main benefit of a rechargeable hearing aid is simple convenience. We are used to plugging in our phones and other devices overnight for them to charge up. 

For anybody with poor dexterity or issues with their fingers, having a rechargeable aid makes a huge difference as normal hearing aid batteries are quite small and some people find them fiddly to change.

One downside is that if you forget to charge your hearing aid, then it is a problem that can't be instantly fixed. For most a 30 minute charge will get you at least two or three hours of hearing, but if you are the type of person who is likely to forget to plug them in regularly then you're probably better off with standard batteries.

Rechargeable aids are also a little bit bigger and are only available in behind the ear models.

Finally, just like with a mobile phone, the amount of charge you get on day one is not going to be the same as you get a few years down the line. Be sure to ask what the policy is with the manufacturer warranty when it comes to replacing the battery.

 

Are behind the ear aids better than in the ear aids?

For most people, the answer is yes. But it's never that simple.

The majority of hearing problems affect the high frequencies a lot more than the low ones. Therefore open fitting hearing aids sound a lot more natural and ones that block your ears up can make your own voice sound like you are talking with your head in a bucket. Therefore in-ear aids tend to be less natural.

However the true answer is we can't tell until we have had a look in your ears to assess the size of your ear canal, and until we have tested your hearing to see which frequencies are being affected.

People with wider ear canals tend to have more flexibility, also there are open fitting modular CIC hearing aids now that do not block your ears.

There is also the age old rule to consider, that a hearing aid will not help you if it's sat in the drawer gathering dust. If the only hearing aid you would be happy wearing is one that people can't see, then that's what you should get.

Most people can adapt to any type of hearing aid, as long as they know what to expect. Have an honest conversation with your audiologist as to what your needs are.

What are channels, and how many do I need?

Generally speaking, six or more. Unless it's none at all.

The number of channels a hearing aid has is often a simplistic way an audiologist will use to explain why one hearing aid is better than another, but channels are complex and it is really not that straightforward.

Hearing aids amplify sounds of different frequencies by different amounts. Most people have lost more high frequencies than low and therefore need more amplification in the high frequencies. The range of sounds you hear are split into frequency bands or channels and the hearing aids are set to provide the right amount of hearing at each frequency level.

Less than six channels and this cannot be done with much accuracy, so six is the magic number. However, a six channel aid is typically very basic with few other features and is suitable only for hearing a single speaker in a quiet room. The number of channels is not what you should be looking at, it's more the rest of the technology that comes with them.

As a final note, different manufacturers have different approaches. One method is not necessarily better than any other. For example some manufacturers have as many as 64 channels in their top aids. Most tend to have between 17 and 20. One manufacturer has no channels at all.

Where can I get the hearing aids covered?

Hearing aids are easily lost, misplaced or damaged and typically are one of the most expensive personal possessions an individual can own. We offer hearing aid warranty cover for £80 per year per aid.  Find out more here

How much does the hearing test cost?

All our audiologists use the very latest technology and provide the full range of tests to accurately measure your hearing for free.  Find out about what we offer all our customers here

Do home visits cost extra?

Hearing Aid UK offers all their customers free home visiting services and home visits for hearing aids - Including hearing tests, fittings, maintenance, check-ups and much more in the comfort of your own home and at your convenience.  Find out more information here

How come you're much cheaper than other places?

Here, at Hearing Aid UK, we are dedicated to offering low hearing aid prices. We achieve this by having no head office and low marketing costs.   Our hearing aid prices are amongst the lowest you will find anywhere in the world.

Other pages you might find useful

Audiology Home Visits
View Audiology Home Visits
Best Hearing Aids 2024
View Best Hearing Aids 2024
Hearing Tests at Home UK
View Hearing Tests at Home UK
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