ramp-up ramp-upgradually increasing the sound source level Related Articles: Pile drivingTutorial: Pile DrivingSeismic AirgunsTutorial: Seismic AirgunModerate or eliminate the effects of human activitiesTutorial: How can we moderate or eliminate the effects of human activities?DOSITS FAQ Chris Knowlton2017-02-26T20:10:00-05:00