[en] Concern is growing that marine fauna can be affected by noise such as naval sonar, pile driving or geophysical surveys, among others. Literature reports a variety of animal reactions to human noise (from apparently null or negligible to strong). However, conclusive results on its effects on marine mammals at individual and population level are still lacking. In 2015, the Italian Environmental Impact Assessment Commission mandated seismic operators apply a standard scientific protocol comparing marine mammal presence before, during, and after offshore seismic survey. For 60 days before and after the survey, marine mammals are monitored using visual and acoustic methods. One or more acoustic autonomous recorders, depending on area size, must also be deployed throughout the three phases for continuous monitoring. Consistent data gathered from many surveys will enable robust statistical analysis of results. Diffusion of this monitoring method internationally would improve the study of far-reaching, intense, low frequency noise. - Highlights: • To date the impact of seismic surveys on marine mammal species is poorly understood. • Routine data collection following scientific method is essential to understand impacts of seismic surveys on marine mammals. • Italy mandates seismic operators to collect marine mammal presence data before, during and after seismic surveys. • Data gathered under Italian regulation will be applicable to improve mitigation of seismic surveys on marine fauna.