ultrasons
What say the birds
Birds whistle, chatter, cackle, scream or howl. But what do they say? Words of love. And these words seduce both females and juries of singing competitions. The canaricultor Gabriel de la Paz explains what notes produce Harz Roller canaries and how birds are selected for competitions. The songs are tailored to the physical characteristics of […]
To see by listening
Bats and dolphins generate images from echo, in certain sense they are able to see by listening. Similarly, the blind do as well. The reporter Pere Renom renounces for a while to the vision in order to experience how “sounds” reality aided by an instructor ONCE (Spanish National Organization for the Blind).