Complete Audio Measurement System for environmental mesurements

Complete Audio measurement system including USB measurement microphone and software for environmental mesurements This packackage contains an IEC61672 class 2 low noise USB measurement microphone together with a powerful analysis software optimized for enviromental noise measurements. This measurement microphone uses a real 1/2" capsule with 12,7mm diameter. Many simple measurement microphones use a cheap 1/4" caspsule (6mm) in a 1/2"-housing. The effective area of the diaphragma is 4 times smaller. This leads to significant higher noise.The following picture demonstrates a 1/2" capsule in contrast to a 1/4"-electret capsule. Specification: Meets IEC61672 class 2 Mesurement range: 20dB(A)-128dB(A) Frequency range 5Hz -20kHz Capsule: 1/2" pre-polarized typical 25mV/Pa Parameterers:FFT,LAEQ,LCEQ, LCPEAK,LAFMAX etc.  wideband or with 1/3 octave resolution Integration interval: 35ms up to days weeks Connection: USB Software requirements: Windows XP,Vista,7,8,10 32/64 bit Package contains: USB measurement microphone ATD4-S class 2 Analysis softewre for non commercial usage in english version (multilangual: spanish, french, italian) Frequency range 5Hz -20kHz Capsule: 1/2" pre-polarized typical 25mV/Pa Tripod adaptor USB cable 3m A Laptop is not included