Dennis Hugh Barnes

Title: Dennis Hugh Barnes: Innovator in Loudspeaker and Noise Cancellation Technologies

Introduction

Dennis Hugh Barnes is a notable inventor based in Mesa, AZ (US). He holds 2 patents that showcase his innovative contributions to the fields of audio technology and noise cancellation. His work has significantly impacted how sound is managed and experienced in various applications.

Latest Patents

One of Barnes' latest patents is for an **Adjustable Loudspeaker**. This invention features a loudspeaker motor structure that utilizes variable geometry to modify the effective magnetic field acting on the voice coil. The design includes a magnet that generates the magnetic field, which couples into a front plate, a back plate, and a pole piece. In this loudspeaker, the front plate and pole piece are designed with notches and slots. By rotating the pole piece relative to the front plate, the gap width between them can be adjusted, thereby altering the effective magnetic field. In another configuration, the pole piece can move up and down in relation to the back plate, which also changes the magnetic coupling and the effective magnetic field in the gap. These variations lead to changes in the loudspeaker's performance parameters.

Another significant patent by Barnes is the **Electronic Muffler**. This device is designed to suppress noise emitted from an engine's exhaust pipe. It consists of a housing with an outlet and multiple audio transducers that generate anti-noise to cancel out unwanted sounds. A strategically placed microphone detects residual noise and is linked to a cancellation signal generator that controls the anti-noise produced by the transducers. This innovative design allows exhaust gases to pass through the housing while effectively canceling engine noise before it exits.

Career Highlights

Throughout his career, Dennis Hugh Barnes has worked with several companies, including Dei Headquarters, Inc. and Noise Cancellation Technologies, Inc. His experience in these organizations has contributed to his expertise in audio technology and noise management.

Collaborations

Barnes has collaborated with notable individuals in his field, including John A. Cain and David A. Dye. These partnerships have likely enriched his work and led to further advancements in his inventions.

Conclusion

Dennis Hugh Barnes is a distinguished inventor whose work in adjustable loudspeakers and electronic mufflers demonstrates his commitment to innovation in audio technology. His contributions continue to influence the industry and enhance the way sound is experienced.