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Thin speaker offers 'crisp sound'

Anyone who has struggled to understand speaker announcements at train stations will be heartened by work initially done at Warwick University in the UK.

Engineers claim their new ultra-thin speakers, as well as looking good and being easy to conceal, will also deliver clearer, crisper sound.

The loudspeakers could replace public address systems in passenger terminals and shopping centres.

They could also be used as speaking posters to deliver adverts.

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