Sound Meter – decibel meter is a sound meter for your smart phone. Sound Meter is also known as Sound Level Meter (SPL), Decibel meter, db meter, noise meter or Noise detector. Noise meter – decibel meter uses phone microphone to measure environmental noise decibels (db) and show its value in decibel. Sound Meter or Noise detector is also known as pressure level meter which can be used to measure too noisy sounds and also for sound test. Noise detector is used to measure different noise level, i