Creative Technology Corporation

Boon Cheong Raymond Ng

Wong Hoo Sim

Thean Kuie Christopher Chang

Chee Sin Cheah

Huoy Ru Rachel Koh

Fong Lin Leong

Shin Huei Eric Seow

A noise reduction circuitfor a headphoneis disclosed herein. In a described embodiment, the headphoneincludes a speaker driverand the circuitcomprises a microphoneconfigured to convert ambient sound into a corresponding electrical ambient signal and which is disposed adjacent to the speaker driver's diaphragm. The circuitfurther includes an active noise reduction path configured to provide active noise reduction of the ambient sound based on the corresponding electrical ambient signal and a vocal signal compensation path configured to restore attenuated signals within the vocal range of the corresponding electrical ambient signal to increase audibility of vocal signals of the ambient sound. The circuitalso includes a switching devicearranged to selectively deliver the corresponding electrical ambient signal to the active noise reduction path or to the vocal signal compensation path.

Noise reduction circuit with monitoring functionality

There is provided an insert ear bud earphone with variable noise isolation. The earphone includes a housing with a serpentine channel which is able to contain at least one transducer in a main body of the housing; and a cushion which contacts a user's ear canal wall, the cushion being mounted on the serpentine channel. There is preferably at least one opening in either the housing or the cushion which causes leakage and allows ambient noise to enter the user's ear canal. There is also provided a cushion for an insert ear bud earphone. Finally, there is provided a method to enable variable noise isolation in an insert ear bud earphone comprising an inclusion of at least one opening in either a housing of the earphone or a cushion mounted on the earphone which causes leakage and allows ambient noise to enter a user's ear canal.

Ear bud earphone with variable noise isolation, a cushion for an ear bud earphone and a corresponding method

Growing community of inventors

Singapore, Singapore

Boon Cheong Raymond Ng