公开(公告)号：US20170238090A1

公开(公告)日：2017-08-17

申请号：US15504312

申请日：2014-08-18

Applicant: Apple Inc.

Inventor： Martin E. Johnson ,  Gordon R. Dix ,  Michael B. Howes ,  Gary P. Geaves ,  Tom-Davy William Jendrik Saux

IPC: H04R1/40 ,  H04R3/14 ,  H04R1/02 ,  H04R1/24

CPC classification number: H04R1/403 ,  H04R1/025 ,  H04R1/24 ,  H04R3/14 ,  H04R5/02 ,  H04R2201/401

Abstract: A multi-way speaker array is disclosed that includes rings of transducers of different types. The rings of transducers may encircle the cabinet of the speaker array such that the speaker array is rotationally symmetric. The distance between rings of transducers may be based on a logarithmic scale. By separating rings of transducers using logarithmic spacing, denser transducer spacing at short wavelengths is achieved while limiting the number of transducers needed for longer wavelengths by spacing them in larger and larger logarithmic increments. Transducers with overlapping frequency ranges may be used in the speaker array to avoid initial dips or shortfalls in directivity for corresponding beam patterns.