DIY Sound Laser : Big Speakers Aren’t Required for Pinpoint Sound

Create a focused speaker so your music targets only the listener. That demodulates at 40 kilohertz, with an H-bridge and ...

Father found dead in Hyde Park lake on Christmas Eve after going missing three weeks earlier

Gareth Griffiths, 45, had travelled to Londonf rom his home in Cornwall in early December to visit his youngest son, 13, who ...