NC-72A0 pages
P I S T ON P HO N E
Standard sound source
that generates a constant sound pressure of
114 dB at 250 Hz.
A ll ow s c a lib r a tio n w i th a c c u r a cy of ± 0.15 d B.
U s a b l e i n w i d e te m p e r a tu r e a n d h u m i d i t y r a n g e.
U s a b l e a s a s t a n d a r d s o u n d s o u r c e i n l a b o r a to r i e s
o r a s a c a lib r a tio n s o u n d s o u r c e fo r s o u n d l eve l m e te r s o n s i te.