High broadband directivity reduces lateral reflection levels in loudspeakers

Evidence

In Figure 4.7 the higher broadband directivity of the ESL 63 results in lower-level first-order lateral reflections than either of the cone and dome designs. All three systems show gently uneven frequency responses in the estimated opposite-wall reflections, but all three are much worse in the farther off-axis adjacent-wall reflections, and the actual off-axis angle is greater than those used to create the estimates. — Toole, Floyd E, Sound reproduction- the acoustics and…, 438

Categorization

• XREF: Connects to the reader’s ongoing interest in loudspeaker directivity and its room-interaction consequences from Rooms chapters.
• DEFINE: Illustrates the concept of broadband directivity and its measurable acoustic effect on reflections.