Bleep bleep!: determining smartphone locations by opportunistically recording notification sounds

摘要: Every day, we carry our mobile phone in pocket or bag. When arriving at work to a meeting, may display it on the table. Most of time, however do not change ringtone volume based new location. This result embarrassing situations when is too loud missed calls and alarms low. In order prevent such situations, propose non-intrusive opportunistic approach determine location later adapt accordingly. approach, analyze attenuation played ringtones nature surrounding elements. We evaluate prototypical implementation using different phones show that are able recognize sole with precision more than 94%. second step, consider environments reach 89% for position 86% combination noise level environment, respectively.