Patent ID: 11902750
Assignee: TEAM IP HOLDINGS, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An amplified listening device comprising:
a housing comprising a sound tube having an acoustic channel;
a first directional microphone configured to provide a first electrical signal having a first phase, the first directional microphone comprising:
a first front microphone inlet port closest a front of the amplified listening device; and
a first rear microphone inlet port behind the first front microphone inlet port;

a second directional microphone configured to provide a second electrical signal having a second phase opposite the first phase, the second directional microphone comprising:
a second rear microphone inlet port adjacent the first rear microphone inlet port of the first directional microphone; and
a second front microphone inlet port behind the second rear microphone inlet port, wherein the first front microphone inlet port, the first rear microphone inlet port, the second rear microphone inlet port, and the second front microphone inlet port are linearly aligned in a same plane;

a resistive summing circuit without phase inverting circuitry, the resistive summing circuit configured to combine the first electrical signal and the second electrical signal to generate a second order directional response; and
a receiver configured to:
convert the second order directional response to sound; and
output the sound through the acoustic channel of the sound tube.