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Look at the example: Why waves corresponding to each note of the piano are different? The fluctuations are called frequency vibrations and its unit of measurement is the Hertz. Our realize eardrum and vibrates when the sound wave is 20-20000 Hz, sounds below 20 Hz (infrasound) and above 20,000 Hz (ultrasound) we could not hear. Have you noticed that the whistles to call some animals like dogs or dolphins, but we could not hear the animals hear? Intensity: depends on the force used to hit an object or musical instrument (drums, xylophone, cymbals, piano keys ...). This beat can be strong, medium or weak. The intensity is also determined by the amount of air used to make a wind instrument "touch" or when we sing a song. When your mother or neighbors complain that your sound is too high, correct? Or would the correct "their sound is very intense"? The intensity of sound is measured by the unit called "Bel 1" (after the scientist A. Graham Bell, inventor of the telephone). Have you heard of the submultiple of the unit? 1 decibel = 1 dB = 0.1 Bel. The sound with less intensity than we can hear was assigned the value zero decibel (0 dB) and the loudest sound we hear without pain, corresponds to the value of 120 dB. Did you know that there are laws that indicate the maximum decibel at a nightclub or factory, for example? And many people end up having problems hearing because these limits are not respected? Density is related to the number of sounds at the same time, determining the sound mass. The change of a few or many
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Pogledajte na primjer: Zašto valovi odgovaraju svakom notom glasoviru su različiti? Kolebanja su pozvani frekvencija vibracija i njezina mjerna jedinica je Hertz. Naš shvatili bubnjić i vibrira kada je zvuk val je 20-20000 Hz, zvuči ispod 20 Hz (infrazvuk) i iznad 20.000 Hz (ultrazvuk) nismo mogli čuti. Jeste li primijetili da su zviždaljke pozvati neke životinje poput pasa ili delfina, ali nismo mogli čuti životinje čujete? Intenzitet: ovisi o sili pogoditi objekt ili glazbeni instrument (bubnjevi, ksilofon, činele, klavirskih tipki ...). Ovaj beat može biti jak, srednji ili slab. Intenzitet se također određuje količinu zraka koji se koristi da bi puhački "dodir" ili kad pjevamo pjesmu. Kad je tvoja majka ili susjedi se žale da vaš zvuk je previsoka, točno? Ili bi točna ", njihov zvuk je vrlo intenzivna"? Intenzitet zvuka mjeri se jedinicom pod nazivom "Bel 1" (poslije znanstvenik A. Graham Bell, izumitelj telefona). Jeste li čuli za submultiple jedinice? 1 Decibel = 1 dB = 0,1 Bel. Zvuk s manjim intenzitetom nego što možemo čuti dodijeljena decibela vrijednost nula (0 dB), a najglasniji zvuk koji čujemo, bez boli, odgovara vrijednosti od 120 dB. Jeste li znali da postoje zakoni koji ukazuju na maksimalnu decibela na noćnom klubu ili tvornice, na primjer? A mnogi ljudi završiti s problemima sluha, jer ove granice ne poštuju? Gustoća se odnosi na broj zvukova u isto vrijeme, koji određuju zvuka mase. Promjena malo ili čak