à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ Sound Meter > à¤Ã×èͧÇÑ´àÊÕ§ Sound Level Meter AZ-8925 Sound Level Meter à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ à¤Ã×èͧÇÑ´àÊÕ§ Rang A weighting : 40dB~130dB C weighting : 45dB~130dB Accuracy at 94 dB,1KHz :±2dB Analog Output :AC 0.707Vrms (F/ S) Operation Temperature :0~50℃, 10~90%RH. Storage Temperature :-20~60℃ Quasi-Analog Bar indicator :1dB display step, 30dB display range, updated every 50ms Hold :Max./ Min. Record :Maximum Hold. Microphone :10mm Dia. electric condenser microphone Battery life :30 hours typical (9V) Meter size :72 x 182 x 30mm / 150g.(8928) 57 x 230 x 44mm (8925) Standard accessories:Manual, 9V battery (8928) AAA battery à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ Sound Meter > à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ Sound Level Meter AZ-8925