초록 ▼

In the area of active noise cancellation headsets, the noisy environment often encountered in the link with communication systems causes lack of intelligibility on the outward communications path. Consequently another in-wire cancellation channel to enhance the intelligibility is required. This addi

In the area of active noise cancellation headsets, the noisy environment often encountered in the link with communication systems causes lack of intelligibility on the outward communications path. Consequently another in-wire cancellation channel to enhance the intelligibility is required. This additional processing channel adds to the cost of the headset. The invention uses residual microphones (12) to reproduce the sound that remains in the ear after cancellation so that the controller (13) can make further adjustments through filter (15) and LMS adapter (14) to the anti-noise signal.

대표청구항 ▼

A hands-free active noise canceling headset comprising: clamping means adapted to secure the headset to the users head, at least one open back headset on said clamping means, said headset including a speaker means and a residual microphone means, and a controller means operatively connected to said

A hands-free active noise canceling headset comprising: clamping means adapted to secure the headset to the users head, at least one open back headset on said clamping means, said headset including a speaker means and a residual microphone means, and a controller means operatively connected to said speaker means and residual microphone means and adapted to both produce an anti-noise signal to said speaker means and adapted to receive signals from said residual microphone means representative of outward bound communications, wherein said controller means includes an LMS adapter, an adaptive filter means and an equalizer means to handle the anti-noise signals and communications signals from said residual microphone means.