Method and Apparatus for Minimizing or Preventing Interference of Two-Way Radio Speaker Microphones Caused by Fine Metal Particles

摘要

A speaker microphone design that prevents, eliminates, and/or minimizes speaker mechanical failure caused by fine metal particles in the ambient environment. The contemplated invention includes embodiments that utilize one or more barrier cover installed at a location between the speaker diaphragm and the grille. The barrier cover can be a thin shell of various shapes and sizes, such as a dome-shaped structure. In other embodiments, the barrier cover can be a thin membrane, such as a Bayer® film. Additionally or alternatively, the speaker is positioned further back away from the grille, to provide a clearance space of at least 10 mm between the diaphragm and the grille. This novel design of clearance is also effective in preventing, eliminating, and/or minimizing speaker mechanical failure caused by fine metal particles in the environment.

主权项

1. An anti-interference speaker microphone for a two-way radio, the speaker microphone comprising:
a body having an outer casing, wherein the outer casing has a front grille and a back portion; a speaker enclosed within said outer casing, said speaker has a diaphragm which has an outer circumference and a diameter X; said speaker has a magnet and a voice coil coupled to the diaphragm, wherein the diaphragm is disposed between the front grille and the magnet, and the magnet creates a magnetic gap; a bather cover disposed between the front grille and the diaphragm to physically prevent passage of a plurality of fine metal particles therethrough; wherein the barrier cover is comprised of one selected from a group consisting of a membrane, a dome structure, a cone structure, and a short cylindrical structure.