Volvo S60 test ramp, engine EM258.wav

Please check the full pack for other sounds in this set.

Here are engine acceleration + deceleration ramps of a bog standard 1st gen Volvo S60, taken from a engine bay (inside) angle. The car was/is equipped with a 2.4-liter 5-cylinder inline engine and stock exhaust. I recorded the ramp driving on 2nd gear, going uphill on a straight asphalt road. A Roland R-26 was used to record at 96kHz 24-bit.

The scope of recording session was to:

1) try how the said mic performs for on-board car recording, and
2) capture acceleration ramp while reading out the rpm gauge

For latter, I've tagged the ramp files with markers to indicate the actual momentary RPM of the engine. This allows to verify pitch conversion formula from Hz to rpm for an engine with uneven amount of cylinders and study Hz-to-rpm conversion via spectrogram readout.

Engine was recorded using a diy EM258 capsule fitted with basic foam windshield and powered by Rode VXLR+. Inside the engine bay, the mic was mounted under the hood, near the right-side hinge for least heat exposure. Windshielding was inadequate so the file has been treated with +18dB / oct highpass to remove some wind rumble.