audio video search
For humans, hearing is limited to frequencies between about 20 Hz and 20,000 Hz (20 kHz), with the upper limit generally decreasing with age. You can do Audio Video Search and Play on the PlayAudioVideo search engine. Other species have a different range of hearing. For example, dogs can perceive vibrations higher than 20 kHz. As a signal perceived by one of the major senses, sound is used by many species for detecting danger, navigation, predation, and communication. Much more, including Audio Search and Play and images on the PlayAudioVideo search engine. Earth's atmosphere, water, and virtually any physical phenomenon, such as fire, rain, wind, surf, or earthquake, produces (and is characterized by) its unique sounds. Many species, such as frogs, birds, marine and terrestrial mammals, have also developed special organs to produce sound. In some species, these have evolved to produce song and (in humans) speech. Video Search and Play is easily done on the PlayAudioVideo search engine.
Furthermore, humans have developed culture and technology (such as music, telephone and radio) that allows them to generate, record, transmit, and broadcast sound. Also, try Audio Video Search and Play on the PlayAudioVideo search engine.
More about audio video image search on info42
More about audio video image search on info43
Parts of text from: Wikipedia