let (something) slip (out)
to tell a secret by accident
I let the date of the wedding slip out by mistake at the dinner party.
Precautions while using Earphones
Iems and Auditory Damage
Lets just get this most common myth out of the way IEMs are more dangerous due to their proximity to the eardrum. This couldnt be further from the truth. When used in the right manner, they are just as innocuous as your regular earbuds or headphones. In fact, the way they function makes them less likely to cause ear damage. Its all down to the physics.