> This is probably why the grand-old parent recommends earplugs in addition. Ya. Exactly. The noise cancellation works great to remove the engine noise. But as

> This is probably why the grand-old parent recommends earplugs in addition. Ya. Exactly. The noise cancellation works great to remove the engine noise. But as soon as you turn them on, high-pitch sounds become a lot more apparent. Earplugs help alleviate that.