回答“Can I fix the my headphones so the sound in the left ear works?”Often times dirt will contaminate the contacts on the female part of a 3.5mm audio connection, and these Bose headphones aren't immune to this problem. The symptom of this is audio that cuts in and out when you rotate or apply sideways pressure to connector on the end of the cable. To fix the problem yourself, moisten one end of a cotton swab stick in rubbing alcohol (do not soak it). With the headphones held upright (so that drips exit the 3.5mm jack instead of entering the speaker assembly), gently clean the metal contacts. Also clean the connectors on the cable. Allow 15 minutes for the rubbing alcohol to evaporate before using. Do the same for the audio source (an MP3 player, stereo system, phone, etc).