Try the soft plugs you can get at any Home Depot/Walmart that are sold typically for protection from loud machinery. You roll them tight and insert them in the canal where they expand and give good sound suppression while not specifically interfering with any particular frequency. I first used these as a paratrooper where we were issued these to protect against the loud turboprop engine noises and continue to use them with lawn maitenance equipment at home. They work very well, are cheap, and comfortable. Good idea to use something!
Charlie Daniell, DVM
Charlie Daniell, DVM