Digital wildlife

 作者:龚看     |      日期:2019-03-08 01:09:09
By Barry Fox A versatile digital scarecrow promises to put a virtual cat among the pigeons. Birds soon get used to scarecrows, and simulated gunshots are too noisy, note Bramley and Wellesley, a company based in Gloucester, and Phoenix Agritech of Canada. So the firms are patenting (GB 2 323 009) a solid-state digital recorder that stores birds’ distress calls, predators’ cries and the flapping of frightened birds taking flight. An amplifier linked to weatherproof loudspeakers intermittently generates the sounds. To people, they sound like real wildlife,