Patent ID: 11924605
Assignee: SONOS, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A playback device comprising:
an electroacoustic transducer;
an acoustic waveguide in fluid communication with the transducer, the waveguide comprising:
a sidewall extending around a primary sound axis passing through the transducer, the sidewall having a height from the transducer that varies with an azimuthal angle about the primary sound axis such that the height at rear and forward portions of the sidewall is less than the height at left and right portions of the sidewall; and
an opening defined by the sidewall, the opening having a radial dimension from the primary sound axis that varies with the azimuthal angle about the primary sound axis such that the radial dimension at the rear portion of the sidewall is less than the radial dimension at the forward portion of the sidewall; and
a forward axis of the playback device that is horizontally angled with respect to the primary sound axis by between about 60 to 80 degrees,
wherein the transducer and the waveguide are configured such that, during playback of audio at 2000 Hz via the transducer, a ratio of acoustic energy along the forward axis to acoustic energy directed along the primary sound axis is −10 dB or less.