Sound level meter(or SPL) app is shows a decibel values by measure the environmental noise, displays measured dB values in various forms. You can experience tidy graphic design with high frame by this smart sound meter app. Features: - Indicates decibel by gauge - Display the current noise reference - Display min/avg/max decibel values - Display decibel by graph line - Display Elapsed time of decibel - Can calibrate the decibel for each devices **Notes Microphones in most android devices are