On the basis of the analysis of fast Fourier transform and some basic statistical variables,the piling sound is analyzed in frequency domain;then the character,mean absolute deviation,and corresponding parameters on the piling sound recognition are acquired;thus an algorithm can be developed to count the number of piling sound by rule and line.
针对常规人工记录锤击数的低效情况,在此将打桩现场采集的声音信号运用快速傅立叶变换到频率域,对频谱进行多个统计量的分析,并同时考虑了锤击声音可能受到附近噪音的干扰,从中选取平均绝对值偏差这个统计量作为识别锤击次数的特征,由此探测得到一组可以较为精确识别锤击数目的特征参数,实现了锤击数准确识别的自动化。
A digital system,which is used to recognize the number of piling sound,is firstly put forward.
继而在考虑锤击声音可能受到附近噪音污染的情况下,确定出一组精确识别锤击次数的参数。
"Swing, Hammer, Swing!"
音律，音锤，音律！
One of the padded wooden pieces of a piano that strikes the strings.
音锤钢琴中用以敲击琴键的护垫木槌
The hammers strike the piano strings and vibrate them.
音锤敲击钢琴的弦并使之震动。
There was the sound of hammering and the blare of music from the radio.
锤打的声音，收音机音乐的声音不断。
Try to deal with a Gemini boss one sound bite at a time.
和双子座老板交往时要努力作到一锤定音。
Research of Jiang Jia-qiang s Extemportizing Skill;
锤炼语言 依情润腔——姜嘉锵歌唱语言声音研究
car body repair or making metal articles by manual hammering [noisy occupation]
修理车身或以人手锤炼金属制品〔高噪音工作类别〕
An instrument with a keyboard and metal plates struck by hammers that produce bell-like tones.
钢片琴用锤子敲击可发出铃声似的声音的带键盘和金属片的乐器
round-edged set hammer
圆边击平锤[陷型锤]
hammer for hammer mills for skins or leather
生皮或皮革锤磨机用锤
Please beat out this metal with a hammer
请用铁锤把这金属锤平。
Charles, pitiful in his grief, could Barely endure the sounds of the hammer as her coffin was nailed shut.
可怜的查尔斯非常悲痛。当她的棺材钉上盖子时,他简直无法忍受那铁锤敲打的声音。
Dick was always diffident when it came to staff matters, and not been able to summon up the gumption to bang the table.
遇到手下的人事问题时，迪克总是缺乏信心。他还未能发挥才智，一锤定音。
Not for the first time Daniel Agger seemed less than secure against the centre-forward' s power and Drogba was able to knock the ball across for Cole to ram home.
已经不是第一次了，阿格根本对抗不了中锋德罗巴的力量，后者将球横传给科尔，科尔一锤定音。
The carpenter expects similar feedback: the feel of the nail sinking, the sound of the steel striking steel, and the heft of the hammer’s weight.
木匠也希望有类似的反馈，如钉子下沉的感觉，铁互相击打的声音，以及举起锤子的感觉等。
An instrument consisting of tuned strips of metal or glass fixed to a frame and struck with a hammer.
玻璃键琴一种固定在架子上用锤子演奏的、由能发音的金属或玻璃片组成的乐器
air-lift gravity drop hammer
蒸汽重力落锤;单作用空气锤;空气重力落锤
To hammer, bend, or shape with a peen.
锤打锤击、使弯曲或用锤顶来打成一定形状
