Unfortunately there is a known bug in SL thats allows some sounds to go further than the normal 90m limit. To stop the sounds you will need to mute the object emitting them.
Please follow the steps below to locate and mute any rogue sounds.
- On your Firestorm Viewer go to the “World” tab on the top menu
- Look at the bottom category and find “Sound Explorer”
- There you will find a list of all of the sounds your viewer can currently hear. If you are unsure which of the sounds is the one you are hearing but shouldn't be you can play them using the explorer one at a time.
- Once you have found the sound you will be able to blacklist and mute it from the Sound Explorer.