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Acoustic Evaluation Nortel Product Integrity System troubleshooting (1997) |
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Time: 3 weeks Techniques: benchmarking, thermal profiling, acoutic measurement Tools: thermistor anemometers, thermocouples, datalogger, anechoic chamber,venturi nozzle Team: engineering intern (my role), mechanical technologist |
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Design Objective: A customer has raised an issue about the noise of a Nortel system in their unique application. Find a solution to make the system quieter. Design Solution: Reduce the fan speed and thus noise and airflow. Determine the minimum fan speed that the system can safely run within thermal limits. Result: We found that the system could run safely with the fan speeds at roughly a third of the original fan speed within safe operating parameters reducing the noise to a 25dB whisper. |
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| Nortel Passport Enterprise Network System | Nortel Passport circuit board | |
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| Anechoic chamber | Noise meter |  |
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| Bell Northern Research - Product Integrity While at PI Laboratories, I also performed the following tests on wireless and enterprise net work equipment: Electromagnetic immunity testing Electromagnetic emissions measurement Electrostatic discharge testing Transportation bounce testing Transportation testing (linear vibration sweep) Earthquake testing (random vibration) NASA Space Shuttle take-off vibration simulation High G shock testing (95 G) Transportation drop testing |
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