starting at zero pitch 零螺距起动
zero thrust pitch 无推力螺距 ; 无推力节距 ; 零推力螺距
zero torque pitch 无扭矩节距 ; [机] 无扭力螺距
zero-torque pitch 无扭力螺距
The principle of the pitch detection and to increase the accuracy of pitch detection by using "Zero-crossing, detection. signal sep…"
文章还对其基频检测机理和采用“过零检测，信号分离”技术提高基频量测精度作了较详细的论述。
The involved parameters are short-time amplitude and energy, lst-and2nd-order zero-crossing rate, autocorrelation function and pitch period.
所使用的参数是：信号的短时幅度与能量、一阶和二阶过零率、自相关函数及基音周期等。
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