The equal-loudness matching method is well-suited for assessing the overall loudness of complex, time-varying sounds. In this method, participants adjust the subjective intensity of a stimulus to the same overall loudness as a reference. This study evaluated its sensitivity to methodological factors, focusing on three aspects. First, the impact of the comparisons stimuli’ spectra was examined. Typical urban sound recordings were used as references, with adjustable comparisons generated from pink noise filtered to the same average spectrum at varying resolutions (1/1, 1/3 octave bands, or FFT). For the 1/1 and 1/3rd octave bands, the influence of filter shape — flat within each band or interpolated between the centre frequencies — was also analyzed. Second, the test environment’s effect was studied in three settings: a living room-like furnished listening room, a semi-anechoic room, and an uncontrolled condition where participants used their own laptops and headphones. Third, responses from acoustics experts and non-experts were compared, given that colleagues are often recruited for listening tests. Results demonstrate the robustness of the equal-loudness matching method across these methodological variables, supporting its reliability for diverse applications.