In the sound event "item.trident.thunder", the field "volume" is located in the root of the sound definition, instead of in each sound entry. This sound event is defined in the "vanilla_1.20.20" resource pack.
Given that the volume is ear-piercingly loud when actually 1000.0, as shown in the video and resource pack, it should not actually be 1000.0 anyway.
Relates to MCPE-153558