You are downloading the Decibel Meter XAP file v220.127.116.11 for Windows Phone. Decibel Meter is a free and useful Productivity app: An Intuitive way to find environmental noise near you. Decibel Meter application uses the built-in microphone to determine the level of sound it ... You can now download the offline XAP file to install & try it.
Download Locations for Decibel Meter 18.104.22.168 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Decibel Meter XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.