3. Sound is a natural voice made by human, animal, and elements of nature.. Audio is the production, recording, manipulation and reproduction of sound.
4. Back to physics a little for clarify Sound waves exist as variations of pressure in a medium such as air. They are created by the vibration of an object, which causes the air surrounding it to vibrate. The vibrating air then causes the human eardrum to vibrate, which the brain interprets as sound.
5. Sound Waves: Sound waves travel through air in much the same way as water waves travel through water. In fact, since water waves are easy to see and understand, they are often used as an analogy to illustrate how sound waves behave. Constant tone play 20 Hz < ear of human < 20 kHz
6.
7.
8.
9. Audio File Formats (recommend) “ wav”: Very High quality.. Large Size.. Compatible with all soft and devices “ mp3: High quality.. Compressed Size.. Compatible with all soft and devices “ wma”: High quality.. Compressed Size.. Compatible with microsoft software “ RM or RA”: High quality.. Small Size.. Compatible with real player “ amr”: Low quality.. Very small size.. Compatible with mobile phone
