Insertion: Acrylic will be easiest to insert in most cases and especially in the heat. New silicone earplugs require use of lubricating gel. Comfort: Silicone will be more comfortable in most situations. Heat: While earplugs are generally more comfortable than earmuffs, there is insufficient...

Read the reviews. The Bose QC20i are probably the best earphone made to date, period. Read the InnerFidelity review. Sorry Mead.    They have one artifact, the little high-pitch wine that you can hear when there is no background noise any only very soft music. But level of that whine has been...

Can they? Yes.   It's up to the user. When used with most players, yes, if listened to for more than a half hour a day a full volume. These headphones will produce between 98 and 105 dB SPL when driven with one milliwatt at their nominal impedance. For a 32-ohm impedance earphone, which most...