Most of the headphones is typically the level value is exceeded the 100 decibel DB which makes a sound when they accelerated, so much more often as a rubber stopper with a headset in a hole in the ear, or plug the ears need special precautions.
Most headphones have the volume in decibels exceeding 100 decibels or more. Which makes noise when accelerating The sound was very loud Often with a rubber ear plugs into the ear. Or attaches to the ear Therefore, special care
Most often the headset volume is over 100 dB dB above, which makes when accelerate sound, a voice louder so much. Is always with a rubber stopper plug headphones in the ear or ears pinned, so be extra careful.