US 11,706,552 B2
Open audio device
Ryan C. Struzik, Hopkinton, MA (US)
Assigned to BOSE CORPORATION, Framingham, MA (US)
Filed by Bose Corporation, Framingham, MA (US)
Filed on Sep. 2, 2019, as Appl. No. 16/558,239.
Prior Publication US 2021/0067858 A1, Mar. 4, 2021
Int. Cl. H04R 1/10 (2006.01); H04R 1/24 (2006.01); H04R 1/28 (2006.01); H04R 1/34 (2006.01); H04R 1/38 (2006.01)
CPC H04R 1/1008 (2013.01) [H04R 1/24 (2013.01); H04R 1/2826 (2013.01); H04R 1/347 (2013.01); H04R 1/38 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An open audio device, comprising:
an acoustic radiator that emits front-side acoustic radiation from its front side, and emits rear-side acoustic radiation from its rear side;
a front acoustic cavity that receives front-side acoustic radiation and comprises at least one front sound-emitting opening that is configured to emit front-side acoustic radiation at a front sound pressure level (SPL); and
a rear acoustic cavity that receives rear-side acoustic radiation and comprises at least one rear sound-emitting opening that is configured to emit rear-side acoustic radiation at a rear SPL;
wherein the front and rear acoustic cavities each have a fundamental frequency, and wherein the fundamental frequencies are within one octave of each other such that the front and rear SPLs are balanced, so as to reduce sound spillage.