文档介绍：Acoustic Test 1Our test data report?Test report2What we should do for acoustic production??1. Smooth frequency response??2. Sensitivity??3. Max volume??4. Background noise??5. Echo loss?3Knowledge about previous report ?dB Pa、dB V 1V=?dB V 1Pa=?dB Pa?dB Pa/V input 1V(0dB V),output sound pressure?dB V/Pa input 1Pa(0dBPa),output voltage pressure4Test condition ?Measurement range 100Hz~10kHz?Test range 300Hz~?Test signal: sine wave and square wave (only do when test max spl)? inch pinna?Test under conditions that closely approximate typical usage.?Must ensure test repeatability5About frequency Response?Smooth frequency response frequency response?Sensitivity at specify frequency Sensitivity at 1kHz ?Average at whole frequency range Loudness Rating?Max sound pressure Max SPL (sound pressure level)6Frequency response?Floating response template Other way, the FR should be a floating or “be fit” mask. ? Different Headset have different FR? What is the best frequency response 7Frequency Response8Frequency response 9Sensitivity ?Sensitivity at 1 kHz ?Actually the same as the value at 1 kHz of frequency response curve tested before.?Receiver sensitivity is about 10±5 dB Pa at middle volume is best for headset?Mic sensitivity is about -21±4 dB V 10