Patent · US Active

Coating for improving loudspeaker sound quality

US11606640B2 · kind B2 · utility

0Cited by

2References

23Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Juergen Sauer · Beilngries, DE
Veronika Wagner · Tübingen, DE

Key dates

Filing date	Jul 6, 2021
Grant date	Mar 14, 2023
Priority date	—
Expiry date	Jul 6, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2499/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Aspects are disclosed of an acoustically active coating. The coating is a porous coating having a thickness and including between 2% and 30% by mass of a binder and between 70% and 98% by mass of a zeolite. The coating comprises a plurality of convex shapes connected by concave connectors and has a distribution of pore sizes. Other embodiments are disclosed and claimed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.