论文部分内容阅读
(接上期)3.长时平均谱分析长时平均谱是用来表示声音样本中各个频率分量音强的分布情况的图谱,笔者运用Adobe Audition CS6的长时平均谱分析(LTAS)功能,制作出琵琶与吉他音阶样本的长时平均谱。从图2分析得出,该音阶样本0~6kHz的长时平均谱形成了一个明显的振幅包络,其中音强最强的区域在500~550Hz左右的区域,这一区域大于琵琶音阶样本中大字组A(A2)—小字一组a(A4)11个音的基音频率。由此猜想,琵琶共鸣装置(面板)的共振频率大约为500~550Hz。小字一组a(447.31Hz)以下音的基音频率小于乐器共鸣装置最小的共振频率,因此无法激发共振而缺失或能量弱于上方谐音。
(Continued) 3. Long-term average spectrum analysis Long-term average spectrum is a map showing the distribution of sound intensity of each frequency component in a sound sample. The author uses the long-term average spectrum analysis (LTAS) function of Adobe Audition CS6 Long-term average spectrum of pipa and guitar scale samples. As shown in Fig. 2, the long-term average spectrum from 0 to 6 kHz of the scale samples forms an obvious amplitude envelope, of which the region with the strongest sound intensity is in the region of about 500 to 550 Hz, which is larger than the pipa scale sample Large group A (A2) - small group of a (A4) 11 tone pitch frequency. From this conjecture, the resonance frequency of the pipa resonance device (panel) is about 500 to 550 Hz. Small group of a (447.31Hz) The pitch of the pitch of the following tones is less than the minimum resonance frequency of the instrument’s resonance device, so the resonance can not be excited and is lost or weaker than the upper harmonic.