Hi, I'm not an audio expert but just a music lover, and I'm wondering about the Fletcher Munson curve and how this affects our perceptions of sound signature/FR with different listening volumes. My interpretation of this curve is that as the SPL of music changes, the perceived loudness/energy of certain frequencies that our brains interpret will change. (Please correct me if I'm wrong). As we all have different listening volumes (for both lay consumers and reviewers), can we even be speaking on the same page when a reviewer is comparing or leaving impressions on an audio gear (like headphones or IEMs) when most reviewers or consumers don't even mention what is their listening volume at? Some like it loud, some listen very softly, not to mention we all use different sources, different ear tips, have different hearing health and different ear anatomies. To make matters worse, certain gear are very sensitive, like highly sensitive IEMs, and I'm pretty sure our interpretation of certain frequencies will be affected (not sure to what extent) with SPL. Thank you in advance for any input! I'm keen to learn more about this phenomenon, and if it is truly affecting our perception of music, we should all open with a disclaimer of each audio gear review with what volume we are listening to our gear at.