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Audio-monitoring tech keeps announcements audible

by • February 2, 2016 • No Comments

Messages revealed over train station loudspeakers are notorious for being unintelligible. It can in addition be complex to know announcements created in airports, at conferences, or in any number of other occupied public spaces. Germany’s Fraunhofer Institute for Digital Media Technology is attempting to do a thing of it, yet. It’s created new audio-enhancement software, which can in fact find use in smartphones.

Known as ADAPT DRC, the software uses strategically-placed microphones to continuously monitor the ambient sound in the environment. Based on what it hears, it and so manipulates the audio of spoken messages, in order to compensate for competing noise. This is not going to mean which it just turns up the volume, yet.

There are may already processs which just manufacture announcements louder when ambient sound levels increase, but this is not going to always manufacture them simpler to know. In fact, higher volume can sometimes distort spoken words, as it causes the speakers to vibrate.

Instead, ADAPT DRC selectively manipulates specific frequencies, and it does so in real time. This comes with boosting consonant sounds such as “t” and “p” – for the reason these are short-duration high-frequency sounds, they’re particularly prone to being drowned out by other noises.

Additionally, via an existing technique known as Dynamic Range Compression, the software simultaneously boosts the volume of quiet speech sounds while in addition lowering the volume of loud ones. This results in a message which’s delivered at one consistent volume, building it simpler to discern.

As described, ADAPT DRC may in addition find use in smartphones, enabling phone calls to be heard in noisy environments. It may in fact be simpler than implementing the process in train stations or other locations, as phones may already have built-in mics.

Source: Fraunhofer

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