Iphone 7 Otterbox speaker dust plug

I'm in a lot of dusty environments, and this cuts down on the dust that gets inside of my Otterbox cover pretty significantly. I had an iPhone 6 fail after two years due to moisture getting through the speaker. Hopefully, this will help cure that problem as well. Effect on sound performance is also minimal. I would plug and unplug the speakers during music, and it was hard to discern between the two.