Advanced audio tech reveals never-before-heard animal behaviors: caiman chirping in eggs, lions and hyenas nocturnal skirmishes, puzzling fish humming, avian mimicry precision.

Secret World of Sound with David Attenborough is a three-part natural history series exploring the many intricate ways animals use sound to survive and thrive. Incredible footage captured throughout the documentary series gives an intimate look at how baby caiman communicate with each other from within the egg, how lions and hyaenas battle in the dark using sound, how a strange fish baffled residents with its eerie hum, and how some birds have mastered the art of mimicry to remarkable effect. Packed with insight and new scientific discoveries, Secret World of Sound with David Attenborough transports viewers into the natural world for an unforgettable experience full of wonder. Unveiling the very latest in audio technology, the series uses specially adapted cameras and laser vibrometers, which allows humans to truly eavesdrop on the animal world for the first time and discover new stories that have been hidden until now. The series incorporates microphones so tiny they fit on your fingertip, and so precise they can detect the noise of a baby caiman calling from inside the egg. With 360-Dolby Atmos Sound, viewers can experience the breath-taking sounds of the natural world as never heard before.—Stephen Dunleavy