As noted in a previous post, I took my son to an indoor range to test out a new gun. The range itself was pretty standard, but the one thing everyone noticed was that the percussion from others firing their guns, even the 9mm, was substantial...almost uncomfortable.
I talked to an instructor at the range. He said that he just had a hearing test and the doctor told him that he had "substantial hearing loss". He has worked at the range for many many years (a law enforcement type) so that was probably the root cause of his hearing loss.
He suggested that I not only wear my normal hearing protection, but also put on the squishy disposable ear plugs as well. I did but they didn't seem to help that much.
Me thinks that I will stick with the outdoor ranges as much as I can as it is definitely more comfortable in the nicer weather.