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Audio Engineering Explained by Douglas Self

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PREFACE

 

 

The final chapter in this section on Acoustics and Sound Reinforcement comes from Sound Reproduction by Floyd Toole. It deals with the propagation of sound in spaces, and how that propagation interacts with human perception.

The most important phenomenon in this area is the precedence effect, otherwise known as the Haas effect, after Helmut Haas who first described it in his Ph.D. thesis. It was first published in English in 1949. The essentials of the effect are that when two identical sounds, that is, identical sounds of the same perceived intensity, originate from two sources at different distances from the listener, the sound from the closest location is heard first, and this creates the impression that the sound comes from the ...

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