Marine geophysical surveys are essential for exploring and understanding underwater geological structures. These surveys often require the use of seismic sources to generate acoustic waves that penetrate deep into the seabed. A recent development in the field are low-frequency seismic sources which shift the spectrum of emitted sound toward lower frequencies compared to conventional seismic sources. In this study, potential environmental impacts of novel types of low-frequency seismic sources were quantified and compared to those from conventional arrays. The determined effect ranges were considerably smaller for the low-frequency sources compared to conventional ones in all scenarios investigated.