Digital audio

I speak here of the acoustical theory, the main is to make all aspects of a sound guy can understand acoustic, rather Multimedia Speaker the acoustic study, acoustic thesis or master, doctor, so I speak in this book in 1915, an American named e. supachai panitchpakdi ridham to a phone to listen to at that time set on a play sound horn, and the voice can give a group of people listening to celebrate Christmas in the city of San Francisco, electroacoustics was born. After the end of world war I, in the United States President Harding (Harding) his inauguration, the telephone bell companies in the United States of moving coil to connect at the time of the horn on the record player, will be able to pass the sound to watch the inauguration of a bookshelf computer speaker group of people, thus creates a lot of professional audio research and development the amplification engineering this science. The stereo sound researchers not only hard equipment was improved, also experimented with all kinds of different sound to understand human reaction to hearing. But the highest sound human with all know learning is to the overall research, understanding the each link, audio equipment and human physiological reaction to hearing, they made a great contribution.