Observe
Refine
Nortel Product Integrity (1997)
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.
Time: 3 weeks
Tools: thermistor anemometers, thermocouples, datalogger, anechoic chamber,
venture nozzle
Nortel Passport Enterprise
Network System
Passport circuit board
Anechoic Chamber
Noise meter
Bell
Northern Research - Product Integrity
While at PI Laboratories,
I also performed the following tests on wireless
and enterprise network
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
