The test result was gotten by playing the WAV file through my CAS system.
Although the Mic is calibrated, the software is not. There is no option for entering the calibrated data of the mic into the software which is a must for the professional software.
Of course, this is not professional method to test a system. This can only give you a rough information about your system's performance ... ... and your ear's performance.
As I always say ... ... before upgrade the equipment, test your body's performance ... ... for the AV system, please check / test your ear and your eye by a professional.
When playing the WAV file, I found that I cannot clearly hear the sound from 15k Hz and above; however, the test equipment still record there are sound coming out from the speakers.