Those quoting spl would help by stating how you are arriving at that...
RS analog SPL
and calibrated b&K into Audio Tools RTA on the iPad
the ipad built in mic, and my iPhone are off by a scant 10db
of course, yourmilagemay vary
RS analog SPL
and calibrated b&K into Audio Tools RTA on the iPad
the ipad built in mic, and my iPhone are off by a scant 10db
of course, yourmilagemay vary