基本音 meaning in Chinese

essential note

In the sonograms of psittacula agapornis after the section of right side nxiits the ascending parts of the tone disappeared . this causes their vocalizations became the descendent - call . and in the sonograms with the left side nxiits sectioned , the harmonic parts above the basic song were weaken or disappeared
牡丹鹦鹉在断右侧nxllts后其声图中音调上升支消失，因而其叫声变为以降音调为主的降调叫声；在断左侧nxllts后的声图中，其基本音以上的谐波成分减弱或消失而在断双侧神经后其声图表现为一系列具有较低基频的宽带谐波谱。
The calls of non - passerine are some kinds of monotonous dull vocalizations with the characteristics of low and deep frequency , single syllable , low basic frequency and with no ability of modulation in frequency and amplitude . most of the calls are monotonous and low quality mainly based on the basic song . compare the vocal of sub - oscine passerine with non - passerine , they have some similar aspects , but the former possesses of stronger capability of vocal control
非鸣禽的叫声低沉而单调，音节种类单一，基本音频率低，缺乏频率调制以及幅度调制的能力，叫声的品质因数很低，不悦耳，大多为以基本音为主的单音调低音品叫声，亚鸣禽的叫声与非鸣禽近似，但在控声能力方面又有所提高。