Phitek Systems Limited

Slab Dsp Limited

Mark Donaldson

John Frederick Corey

Damien Oliver Givernet

Edward Scholten

William James Sim

Andre Steyn

Pierre Victor Manuel Guiu

Mathew Robert Brent

Damien Olivier Givernet

An active noise reduction (ANR) component for provision in an earphone housing is disclosed. The device includes a driver and a sensing microphone, the driver and sensing microphone being housed in a component housing. The earphone housing has an outlet passageway from the ANR component to an auditory canal. The ANR component is adapted for use with a controller to provide active noise reduction to the auditory canal over a predetermined range of physical dimensions or acoustic parameters of the housing outlet passageway. The ANR component can thus be used with different housings which simplifies the design process for producing ANR earphone products.

Component for noise reducing earphone

An active noise cancellation earphone () has an acoustic path including a cavity () and a pipe () leading to the auditory canal () which are arranged to form an oscillator in use which has the effect of recovering the open loop system phase characteristics at a selected frequency or frequency range. The earphone () also has two parts () which can be adjusted relative to each other to allow the earphone () to be comfortably and correctly positioned in use.

Noise cancellation earphone

Set of earphones

A jack () typically mounted in an aircraft seat is adapted for use with a variety of headset types. A jack has sockets () accepting any of several different types of plugs associated with different types of noise cancellation headsets or aviation industry headsets including one, two, or three pin types. The jack includes sensing components to correctly detect from the number of pins inserted, and the impedance and/or voltages sensed on those pins, the type of headset being used. With this identification, appropriate connections to the audio source as well as to noise cancellation circuitry may be made to enable the headset to function correctly.

Audio jack with plug or head set identification circuit

A jack () typically mounted in an aircraft seat is adapted for use with a variety of headset types. A jack has sockets () accepting any of several different types of plugs associated with different types of noise cancellation headsets or aviation industry headsets including one, two, or three pin types. The jack includes sensing components to correctly detect from the number of pins inserted, and the impedance and/or voltages sensed on those pins, the type of headset being used. With this identification, appropriate connections to the audio source as well as to noise cancellation circuitry may be made to enable the headset to function correctly

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Auckland, New Zealand

Mark Donaldson