Testing noise levels in the Volt -- my SPL meters on a Round Robin
I have a couple of decent analog Sound Pressure Meters that have been calibrated against each other and to a General Instruments standard. If there is interest I will lend them to the cause. A unit will be shipped along with a notebook to a recipient who will do the measurements and enter them into the notebook, then send the package to the next person, and etcetera. Each participant will therefore incur the cost of one shipment ($5?). When the packages eventually get back to me I will graph the results and publish them in this forum.
I propose collaborative development of a standardized set of simple tests:
Setup of meter (C-weighting*, scale)
Location and orientation of meter in the car
--- three locations for each operating condition
--- SPL meter to be handheld -- no mechanical contact with the car
.......6" above center of front cupholders, mic facing forward
.......2" back of center of steering wheel, mic facing up
.......between front seats at level of seat tops, mic facing to rear
Operating condition of car
--- each situation ICE off and ICE on (mountain mode)
--- two people in front, no extraneous gear in car
--- tires at 38psi
--- "Idle" (hood open for ICE on)
--- 30mph (minimal wind, smooth roadway)
--- 60mph (minimal wind, smooth roadway)
The above is just a first pass, subject to comment here - assuming there is interest. If we compile data from 8-10 vehicles, and yours stands out as particularly noisy under one condition or another, it's a reason for the dealer to do something about it.
Let me know.
C-weighting is relatively broadband, including low frequency noise
Ancient Engineer says: "It's not really yours till you've voided the warranty..."
Chrome carbon-fiber roof to reduce temps, HID headlights, OBD2 display, tint, noise reduction, dashcam, anti-traffic levitation system, and frustrated that my near-perfect Volt offers so few mod opportunities...