Setting electronic delay about 15 ms beyond the acoustic delay yields two acoustic advantages.

Evidence

Electronic delay of the signal will often be required in order to match the acoustic delay. When this is used it should be set at about 15 ms greater than the acoustic delay. This has two advantages: n Firstly, it allows the near speaker to be louder than the further one whilst giving the illusion that the sound is still coming from the further source via the Haas effect, as discussed in Chapter 2. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2529

Categorization

• DEFINE: A concrete, applicable design rule: electronic delay set ~15 ms beyond acoustic delay.
• XREF: Depends on the Haas (precedence) effect introduced in earlier chapters.