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Polycom SoundStation
The Polycom Soundstation is the industry standard for high-end audio-conferencing equipment. I was brought in as a member of the initial development team to solve the audio quality problems that plagued the first prototype units. By establishing correct grounding and power distribution techniques, 90% of the audio quality problems were resolved. The remaining audio quality issues were related to the acoustic separation of the microphones and speaker. In order resolve these issues, it was necessary to build a full-room anechoic chamber. This chamber was used to experiment with the various methods of microphone and speaker placement and methods of mechanically isolating the speaker.\
One Touch Systems Digital Audio
Board
This is a third generation design. I was also responsible for the second generation design. The changes in this design are the introduction of digital audio and the incorporation of an RF converter that converts base-band video to NTSC channels 3 and 4. NOTE: NO EMI SHIELD is required for the video section of the board. This is because this section was specifically designed and laid-out using the "pad-cap" technique.Existing functions also on this board are: Analog telephone interface (FCC Part 68); RS485 serial communications; Display and front panel I/O; ISA bus interface.
Below are examples of the designs, revisions, and tool-making oversight of plastic enclosures and front panels
The One Touch Systems SC210 front panel is an injection molded desktop computer bezel. An inset was required in order to apply a membrane switch overlay. A cutout was created to mount an LCD module. A six inch radius with vents for cooling was created for aesthetics.
The One Touch Systems RK150 Keypad is a second
generation design. This design was created specifically to
improve the manufacturability of the unit and reduce costs. The
first generation design required 8 screws to assemble and
hard-soldered an LCD module to the main board. This made both
assembly and repair quite difficult. In order to repair the unit,
the connector between the LCD and the board had to be cut apart -
with great difficulty and danger to the electronic components.
The RK150 requires only 2 screws to assemble. The LCD module is
now connected to the main board using a "bottom-entry"
connector that allows the assembler (and the repair technician)
to simply "plug-and-play"
Below is a 3D rendering of a machined aluminum drive plate designed in ProEngineer Wildfire 2.0
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