I think the most accurate thing would be for you to look at NIH, OSHA and WHO standards for noise. There's a lot of studies out there and most conclude that office noise should not exceed 70 dBA on a long-term basis. Anything above 85 dBA is considered harmful to hearing. (Keep in mind that this is an algorithmic scale so 80 dBA is ten times louder than 70 dBA.)
Most NHL hockey arenas regularly exceed 85 dBA. To quote from the Journal of Occupational Health and Hygiene:
. Audiometric tests before and after the game were also conducted showing that the participants had a temporary threshold shift in puretone thresholds as well as a reduction in their optoacoustic emission [18]. Similar results regarding noise exposure have also been observed for various employees during hockey games in the US with peak levels varying between 105-124 dBA during the games [19]. Other studies have also shown that the noise level may differ from 81 to 96 dBA Leq and 105-124 LAFm ax depending on where in the arena the individual is positioned during the venue [19]. ...
... Similar results regarding noise exposure have also been observed for various employees during hockey games in the US with peak levels varying between 105-124 dBA during the games [19]. Other studies have also shown that the noise level may differ from 81 to 96 dBA Leq and 105-124 LAFm ax depending on where in the arena the individual is positioned during the venue [19]. The size of the crowd may also be of importance, but also the characteristics of the crowd and the game may also have an effect on the noise level [19]. ...
... Other studies have also shown that the noise level may differ from 81 to 96 dBA Leq and 105-124 LAFm ax depending on where in the arena the individual is positioned during the venue [19]. The size of the crowd may also be of importance, but also the characteristics of the crowd and the game may also have an effect on the noise level [19].
I don't know what our arena noise level is for NHL hockey but I expect it's comparable.
Sound pressure levels have little to do with hearing damage. Damage occurs from "noise."
Anything over .08wrms of distortion shuts down the human ear. Sound pressure levels have little to do with it. One can literally whisper in the presence of 81-96 db & still be audible to those around them, providing the signal to noise ratio isn't excessive.
Canada Life Centre has world class sound, world class components, installed by world class sound engineers.
Literally speaking, there is more cause for concern coming from crowd noise than there would ever be from their Electro-Voice rig which purrs like a kitten providing the audio source is lossless. As for crowd noise, this season for the most part has been a joke. One can hear a pin drop at most games. It's been a morgue win or lose at Canada Life Centre for a half decade now.
The problem you're experiencing could be due to reflection, depending on your seat. In an outdoor environment sound passes by you just once. Indoors is a different beast altogether. Examples of poor acoustic surfaces include glass, mirrors, smooth walls, etc. There was a reason carpeted walls were a thing in the 60's hi-fi era & it wasn't aesthetics, rather it was an attempt to avoid reflection. Canada Life Centre obviously has ice, an ultra selective surface, but the speaker arrays in pro sports arenas don't point towards that surface, rather into the seating areas. From an audio perspective, some of the best seats are the final row of the 200 section as rear reflection cannot physically be an issue. I often sit in section 212 last row right under the 212 sign. Awesome audio experience!
Those complaining of their audio experience can look at two possible sources.
1) Subwoofers. There is tremendous bottom end at Canada Life Centre. Subwoofers are the bane of anyone with a hearing aids existence. Even near inaudible low end frequency wlll play havoc with hearing aids, let alone being subjected to a few hundred thousands watts of it.
2) In game production right at the source. Not all the music being played by the production crew comes from lossless files, in fact some of their production equipment (goal songs for instance) are played from software than can only play .mp3 files. Ampliers amplify. Canada Life amplifying 192kps files to a 15,000 person crowd can easily cause the experience you describe. I notice this immediately when it occurs. Perhaps as much as a quarter of the audio content being broadcast comes from lossy files.
Takeaway from what you've read. Volume & noise don't equate to each other.