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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Re: Your informants are mistaken… posted by Romy on July 29, 2002 at 05:15:45:
by Johan Sundberg (Academic Press). Then you'll understand what you're talking about because fundamental frequency (aka Fo) is the main frequency on a given note. Every sound source which is not producing pure tones (like a diapason or a clinical audiometer that are capable of producing just one frequency sounds) produces sounds which consist in a fundamental frequency and harmonics, all entire multiples of the Fo, thus if a bass is emitting a 37 Hz fundamental, also produces 74, 148, 296..... overtones, but you don't hear all them, due to resonancy characteristics of each instrument overtones can be amplified and conform formants, these formants are the "signature" of every sound source, they allow you to distinguish an /a/ vowel of an /e/ when speaking, the voice from your grandfather from your father's and a real organ from an electronic one. Sound sources DON'T produce harmonics under the fundamental, but some resonance characteristics of the rooms, specially if static waves are present, can enhance the lower frequencies. It is possible, for some instruments, even for human voice, to produce formants of higher intensity than the fundamental, perhaps what your musician friends meant was that in double bass the first formant has more energy than the fundamental, that's why most listeners only perceive that 140 Hz freq you mention, but that doesn't mean that very low freqs. aren't produced.
Have you ever wondered how can an opera singer to sing louder than the whole orchestra if the maximum SPL of human voice at Fo is 105 dB and the orchestra can go above 110 dB? Have you realized that at the opera most of the time you simply cannot understand the words of what they sing? If you're interested I can explain ;-))
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Follow Ups
- I'd recommend you to read "The Science of Musical Sounds" - A.J. 10:48:25 07/29/02 (2)
- Language Barrier. - sam9 14:49:28 07/29/02 (1)
- XDD OK, I'm giving as understood they're singing in a lenguage you understand... - A.J. 11:27:49 07/30/02 (0)
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