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Connecting broadcast media and mobile

How It Works
If you want to find out how Intrasonics can help you engage with your audience or customers, then we want to hear from you...


These are some of the questions most commonly asked about our technology.
Does it use ultrasound?

No, Intrasonics is encoded using part of the audible frequency band. We are one of very few companies in the world that have an audio watermarking technology that works in the audible domain. This is essential for us since broadcasters filter out high and low frequency audio.
Does it upset dogs or other animals?

No, because it doesn't use high frequency sound. The vast majority of humans and other animals, including dogs, cannot hear any difference between audio with or without our artificial echoes embedded.
Exactly what data is in the audio watermarks?

Our technology is typically used to transmit short numerical codes rather than transferring large amounts of data, but the size of code and resulting action when the code is received will depend entirely on the application.
How much data can be squeezed into the embedded audio signals?

The bandwidth available when transmitting hidden and inaudible data in audio is very small. Typically our codes are just large decimal numbers but there is sufficient scope for all our customers to each licence their own exclusive range of the available code spectrum.
What mobile phones can be used to run the listening apps?

At present we provide watermark decoders that can run on all Apple iPhones, iPads and most modern iPod Touch models. And our Android decoders can run on just about any Android phone or tablet that has a microphone.
Can we incorporate the technology in our existing iPhone app?

Yes. Anyone developing an app can easily incorporate an Intrasonics watermark decoder into their app using our SDKs for iOS and Android.
Does background noise obscure the audio codes?

In a home environment, even with background noises and people talking around you, if you can hear the audio coming out of your TV, then your smartphone microphone can hear it too. Our watermark decoder will only fail if the background noise is so loud that you can't actually hear the TV yourself.
Also, we have successfully tested our technology in many environments, including busy, noisy places such as streets (outdoor PA systems), shopping centres, sports arenas and even Wembley Stadium.
Could it work in a live music event?

Yes. Live music and sport events are important application areas for us. A nice example could be a music festival where users pick up codes at different locations and receive rewards for checking in to as many bands as possible. In sport it could be a football match with fans receiving various promotions and offers while running team apps.
Does it work with phones in stand-by mode?

For audience research applications, yes, it's essential to have watermark decoders running in the background. This is straightforward with Android devices but it's also possible with iOS as long as the app is not distributed via iTunes (Apple policy is to reject most apps that harness the microphone while running in the background).
For consumer second screen applications, even if Apple allowed you to publish an app that can listen in the background, we don't recommend it. Our experience is that most people are only happy to allow an app to use the microphone when the app is running in the foreground.
Step One:
Install our demo app on your iPhone. It's on the Apple App Store:
Click to Open iTunes & Download Euphonium
Step Two:
Run the app on your iPhone.
Step Three:
Turn on your computer speakers and see what happens when you watch one of our Demo Videos
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