Limit your exposure by reducing the time of exposure and or the loudness of the noise.Noise destroys your hearing.
If you are listening to your personal stereo with your earphones and you don’t ear someone speak to you, then the music is too loud. Personal stereos turned to hazardous levels are an increasing cause of hearing damage, particularly amongst young people.
If your work place is very noisy, talk to your OH&S officer about making it quieter. It is an employer’s responsibility to provide a safe work environment.