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[#1] 何謂"泛音"?    
請問甚麼是"泛音"?
聽講膽機的泛音會比石機好,是否真的?
Dolby
203.xxx.xxx.70
2003-04-15 13:35
[#2] 何謂"泛音"?    
overtone
mic
210.xxx.xxx.54
2003-04-15 13:58
[#3] 何謂"泛音"?    
任何periodic waveform都是由基音及泛音組成。基音(fundamental)是頻率最低的一個。泛音的頻率必須為基音的倍數,數學上可由Fourier's Transform求得。
泛音沒有"好壞"及"豐不豐富"之分。基音及各泛音的比例必須正確,否則mix出來的聲音便不是原來的聲音("quality"變了)。
很多人將泛音與音符的起始音及結尾音混敖了,以為尾音豐滿便是泛音好。
Hetzer
個人訊息 會員
219.xxx.xxx.4
2003-04-15 22:28
[#4] 何謂"泛音"?    
Hetzer
how to recognize them
bigfoot
個人訊息 正式會員
61.xxx.xxx.246
2003-04-15 22:43
[#5] 何謂"泛音"?    
The characteristic of sound is decided by the waveform. For example, the sound of piano and violin are not the same even if they have same pitch (frequency). "Waveform" is a visual concept and we use overtones to quantify it. A pure note is a sine curve. The sound from tuning fork (音叉) is almost a pure note. Violin is well known to contain a lot of overtones (its waveform is very far away from a sine curve). Piano has less overtones (its shape is closer to sine curve). If you want to judge, you should has an idea of what a pure note "listen" like. It is quite monotonic. The note with more overtones "listen" like something "vibrating".
All the things mention above is steady note (something like blowing a woodwind continuously). Almost all notes are not steady. If you don't have instrument, try to read "吳" (a steady note) and "鬼" (not a steady note) slowly. For AI voice recognition, the leading portion and ending portion of a note is used to identify different words. Plug string and percurssion (piano and cymbal) usually has very sharp leading and ending portion. Saxphone, e.g., has a more steady note.
Hetzer
個人訊息 會員
218.xxx.xxx.89
2003-04-16 00:05
[#6] 何謂"泛音"?    
thx
bigfoot
個人訊息 正式會員
61.xxx.xxx.246
2003-04-16 22:13
[#7] 何謂    
Normally, Fourier's series is for periodic signal and the Fourier's transform is for non-periodic signal.

Fast Fourier's transform is often used for both periodic or non-proiodic signal in digital system.
EDN
個人訊息 會員
203.xxx.xxx.72
2003-04-17 00:05
[#8] 何謂"泛音"?    
懷舊阿郎:
這可能是你「鍥而不捨,尋找廿年夢」的R33最早但還未「壽終正寢」的帖文!
林菲
個人訊息 會員
182.xxx.xxx.109
2019-09-15 10:37
[#9] 何謂"泛音"?    
每個人都會有自己的夢想
以前「南非的曼德拉」
現在有「林鄭的中國夢」
衹可惜「阿郎的R33 舊貼廿年夢」衹可以成為「十六年一覺楊卅夢」
林菲
個人訊息 會員
182.xxx.xxx.109
2019-09-15 11:01
[#10] 何謂"泛音"?    
好耐冇見網友edn 出現了,唔知係咪改左網名,
254mm
個人訊息 正式會員
14.xxx.xxx.158
2019-09-15 11:23
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