文档介绍:Acoustic Test Our test data report ? Test report What we should do for acoustic production? ? 1. Smooth frequency response ? ? 2. Sensitivity ? ? 3. Max volume ? ? 4. Background noise ? ? 5. Echo loss ? Knowledge 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 pressure Test 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 repeatability About 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) Frequency 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 Frequency Response Frequency response Sensitivity ? 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