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Entenem per so la variació periòdica de pressió que
genera un objecte vibrant i que es propaga per un medi
determinat (habitualment l’aire). Quan les vibracions es
produeixen de forma arbitrària, sense cap seqüenciació
rítmica, diem que es tracta d’un soroll.
Perquè una vibració sigui audible per a un ésser huma,
l’objecte a d’oscil·lar, aproximadament, entre 20 i 20000
vegades per segon.
Amplitud(A): es la caracteristica de les ones
sonores que percebem com a volum.
Freqüencia (f): Es el nombre de cicles colets
que es repeteixen en un segon. Les ones que
es repeteixen cada cert temps s’anomenen
periodiques. La freqüencia es mesura en
hertzs(Hz) i 1 Hz equival a un cicle per segon.
Període (T): Es el temps que triga a produir-se
un cicle.
Longitud d’ona (λ): Es la distancia que
recorre el so en un cicle complet.
La intensitat depen de l’energia que
transporta l’ona sonora i esta en relació
directa amb la seva amplitud. Amb una ona
de més amplitud tindrem la sensació de que el
so és més fort.
L’altura o to és la caracteristica que permet
percebre un so com a més greu o més agut
que un altre. Les freqüencies inferiors a 20 Hz
corresponen als anomenats infrasons, i les
superiors a 20 kHz corresponen als ultrasons.
El timbre és la caracteristica que ens ajuda, a
reconeixer les persones per la veu o distingir
diferents tipus d’instruments musicals.La
freqüencia de vibracio mes greu es la que
determina, normalment, el periode i el to, i
s’anomena freqüencia base. La resta de
freqüencies són harmonics.
El proces mitjançant el que es transformen
dades analogique a un format digital
s’anomena digitalitzacio.

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so

  • 1.
  • 2. Entenem per so la variació periòdica de pressió que genera un objecte vibrant i que es propaga per un medi determinat (habitualment l’aire). Quan les vibracions es produeixen de forma arbitrària, sense cap seqüenciació rítmica, diem que es tracta d’un soroll. Perquè una vibració sigui audible per a un ésser huma, l’objecte a d’oscil·lar, aproximadament, entre 20 i 20000 vegades per segon.
  • 3. Amplitud(A): es la caracteristica de les ones sonores que percebem com a volum. Freqüencia (f): Es el nombre de cicles colets que es repeteixen en un segon. Les ones que es repeteixen cada cert temps s’anomenen periodiques. La freqüencia es mesura en hertzs(Hz) i 1 Hz equival a un cicle per segon.
  • 4. Període (T): Es el temps que triga a produir-se un cicle. Longitud d’ona (λ): Es la distancia que recorre el so en un cicle complet.
  • 5. La intensitat depen de l’energia que transporta l’ona sonora i esta en relació directa amb la seva amplitud. Amb una ona de més amplitud tindrem la sensació de que el so és més fort.
  • 6. L’altura o to és la caracteristica que permet percebre un so com a més greu o més agut que un altre. Les freqüencies inferiors a 20 Hz corresponen als anomenats infrasons, i les superiors a 20 kHz corresponen als ultrasons.
  • 7. El timbre és la caracteristica que ens ajuda, a reconeixer les persones per la veu o distingir diferents tipus d’instruments musicals.La freqüencia de vibracio mes greu es la que determina, normalment, el periode i el to, i s’anomena freqüencia base. La resta de freqüencies són harmonics.
  • 8. El proces mitjançant el que es transformen dades analogique a un format digital s’anomena digitalitzacio.