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<blockquote data-quote="John Roberts" data-source="post: 75841" data-attributes="member: 126">Re: Danley SM80 and others shootout Monday January 14 at Danley in Gainesville, GA.I would be apprehensive about trusting a smart phone app for SPL at high levels. While I do not have first hand data, I am somewhat familiar with the types of ICs they use and inexpensive mics, interface with low voltage ICs. These systems gain structure is optimized for speech capture without annoying hiss levels so I would expect them to run out of headroom more than noise floor issues. A dedicated SPL meter could use the same components and perhaps get 10 dB or more range by trading low level accuracy for high level, but at the end of the day it is not a very high dynamic range path, using components mostly intended for speech. A smart dedicated SPL meter could electrically reduce gain in response to measured levels and gain some electrical dynamic range, at some point the transducer will overload. JR</blockquote>

[QUOTE="John Roberts, post: 75841, member: 126"] Re: Danley SM80 and others shootout Monday January 14 at Danley in Gainesville, GA. I would be apprehensive about trusting a smart phone app for SPL at high levels. While I do not have first hand data, I am somewhat familiar with the types of ICs they use and inexpensive mics, interface with low voltage ICs. These systems gain structure is optimized for speech capture without annoying hiss levels so I would expect them to run out of headroom more than noise floor issues. A dedicated SPL meter could use the same components and perhaps get 10 dB or more range by trading low level accuracy for high level, but at the end of the day it is not a very high dynamic range path, using components mostly intended for speech. A smart dedicated SPL meter could electrically reduce gain in response to measured levels and gain some electrical dynamic range, at some point the transducer will overload. JR [/QUOTE]

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