Originally Posted by qguy
Transformers- The Fallen intro
75dB Average, Max SPL at 114dB using Android SOUND METER app via Huawei Nova 2i. Does that sound about right ?
EDIT: Volume at 0dB
There really isn't a right volume to listen at. There is only what you like. But, it's very difficult to say whether those numbers are "right" or not, even at a theoretical level. At a master volume level of 0.0, the nominal average volume of a 5.1 movie might be about 85dB, with potential peaks of 105dB for the regular channels, and 115dB for the LFE channel. Those numbers constitute the Dolby/THX Reference standard for 5.1 movies.
The problem is that film makers may not use an average volume level of 85dB. The actual average could be either higher or lower than that. Think of the overall volume difference (not just the bass difference) between a light romantic comedy and a heavy action thriller. But, even for action movies and blockbusters the overall average volume level can vary widely.
And, the dynamic peaks can also vary widely in both volume and in frequency. Some movies may have a lot of dramatic peaks in volume, and some may have only a few. Think of the difference between A Quiet Place
as an example of one extreme, and contrast that with something like Overlord
, or Batman Versus Superman
, which had many loud peaks in volume.
The overall volume level, and the magnitude of bass peaks, are not just an issue with respect to different movies, but they are also an issue with respect to different theatrical releases of the same movie. The DVD version may differ from the Blu-Ray version, and both of them may differ from the Atmos version, and all of them can differ from a streaming version.
As long as your HT system is properly calibrated by Audyssey, we have to rely on our volume levels to be in appropriate balance with each other, and that the system is approximately calibrated to Reference. Then, we just pick the master volume level, and the amount of bass that sounds right to us for the particular movie or program that we are watching at the time. And, most of us won't use the same master volume level for something like Dunkirk
that we will for some other movies.
gave you a very concise answer to your question, when he suggested that you just relax and enjoy the movie. It will probably be pretty hard to find a movie that exactly conforms to the Dolby/THX Reference numbers cited in the first paragraph. And, it would be very difficult to measure an overall average volume level for an entire movie, even if you really wanted to. Most people just pick the dialogue level that sounds right to them, and work from there.
Film mixers and directors don't typically try to measure the overall average volume level of a movie either. They just use the overall volume levels which sound right to them, at particular points in the movie. They do try to not exceed peak volumes of 105dB/115dB, but that's about it. I hope this explanation helps!