@Paul Morton said:
I’ve used these aps on an Android phone. I compared 3 aps and their readings differed by 20 decibels! They’ll be useful for owners wanting an initial handle on a problem and to get a discussion started. Anything more would require the independence and professionalism of a qualified third party.
paul@lannock.com.au
To increase a reading by 20 decibels you would increase the sound pressure levels 100 times. That is a ridiculous amount of error!
I have a little bit of knowledge in this area and have always assumed that those apps would be pretty useless, however your 20dB difference has blown me away.
I disagree with you, these apps aren’t useful for getting an “initial handle” on a problem, and I would be very unhappy if someone wanted to start a discussion based on such readings (I would stubbornly refuse to put any stock in the readings).