Fontes consultadas:
https://www.youtube.com/watch?v=_ckjttBin58
http://www.ideiasambientais.com.pt/ruido_ambiente.html
http://telecom.inescn.pt/research/audio/cienciaviva/principio_aaudicao.html#aux_anchor
http://www.naval.com.br/blog/destaque/7-como-funciona-o-sonar/um-pouco-sobre-sonar-parte-1/
http://www.phonak.com/br/b2c/pt/hearing/understanding_hearingloss/types_of_hearing_loss.html
http://www.conforsinergia.com/46649_PT-Brochures-StoSilent_Panel.htm.pdf
http://www.infosum.net/pt/communication/auditorium-acoustics-challenges-and-solutions.html
http://www.biblioteca.cm-feira.pt:90/images/winlibimg.aspx?skey=&doc=63756&img=8262&save=true
http://www.ideiasambientais.com.pt/ruido_ambiente.html
http://telecom.inescn.pt/research/audio/cienciaviva/principio_aaudicao.html#aux_anchor
http://www.naval.com.br/blog/destaque/7-como-funciona-o-sonar/um-pouco-sobre-sonar-parte-1/
http://www.phonak.com/br/b2c/pt/hearing/understanding_hearingloss/types_of_hearing_loss.html
http://www.conforsinergia.com/46649_PT-Brochures-StoSilent_Panel.htm.pdf
http://www.infosum.net/pt/communication/auditorium-acoustics-challenges-and-solutions.html
http://www.biblioteca.cm-feira.pt:90/images/winlibimg.aspx?skey=&doc=63756&img=8262&save=true
Imagens:
http://www.eoi.es/blogs/lauranavas/files/2012/05/ruido.jpg
http://www.mdig.com.br/imagens/musica/partitura_da_natureza1.jpg
http://thenextweb.com
https://www.google.pt/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=DfzUoViy9IN0bM&tbnid=lhKr8jOCQuZNhM:&ved=0CAQQjB0&url=http%3A%2F%2Fartesonora.pt%2Fa-fisica-do-som%3Df264&ei=mefAUs6AIYqw0QWM-oDADQ&bvm=bv.58187178,d.ZGU&psig=AFQjCNHyYoMn0X8ajBD76jlZ0IKRQVGM3g&ust=1388460302384900
https://www.google.pt/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=_y-Prncx_3_5zM&tbnid=fcCZ6v3APXklkM:&ved=0CAQQjB0&url=http%3A%2F%2Faefectivamente.blogspot.com%2F2012_02_01_archive.html&ei=ge3AUoDMLqSa0AWYmoBA&bvm=bv.58187178,d.ZGU&psig=AFQjCNHu3kqchJMdgDMh73oMLPi1adqh7g&ust=1388461802726553
http://pilatesvanessamolina.com/wp-content/uploads/2013/04/Pregas-Vocais-Ou-Cordas-Vocais.jpg
http://askabiologist.asu.edu
http://histpetroleo.no.sapo.pt/metodo_sismico_te_ma.jpg
http://www.scielo.br/img/fbpe/rboto/v68n5/a25fig1a.gif
http://www.scielo.br/img/fbpe/rboto/v68n5/a25fig1b.gif
http://www.algosobre.com.br/images/stories/fisica/velocidade_do_som_04.gif
http://www.corposaun.com/wp-content/uploads/2011/04/orelha.jpg
http://www.alvoacustico.pt/alvoacustico/images/Equipamentos/Sonometros/sc-20c.jpg
http://www.phonak.com/br/b2c/pt/hearing/understanding_hearingloss/types_of_hearing_loss/_jcr_content/content/textimage/image.resize.640.499.jpg/1332441043236.jpg/406501620.jpg
http://www.img.lx.it.pt/~fp/cav/ano2007_2008/MEEC/Trabalho_18/MP3/index_ficheiros/image2066.gif
http://files.linguagestual.webnode.pt/200000004-c0207c11aa/Capturer2.JPG
http://www.mdig.com.br/imagens/musica/partitura_da_natureza1.jpg
http://thenextweb.com
https://www.google.pt/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=DfzUoViy9IN0bM&tbnid=lhKr8jOCQuZNhM:&ved=0CAQQjB0&url=http%3A%2F%2Fartesonora.pt%2Fa-fisica-do-som%3Df264&ei=mefAUs6AIYqw0QWM-oDADQ&bvm=bv.58187178,d.ZGU&psig=AFQjCNHyYoMn0X8ajBD76jlZ0IKRQVGM3g&ust=1388460302384900
https://www.google.pt/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=_y-Prncx_3_5zM&tbnid=fcCZ6v3APXklkM:&ved=0CAQQjB0&url=http%3A%2F%2Faefectivamente.blogspot.com%2F2012_02_01_archive.html&ei=ge3AUoDMLqSa0AWYmoBA&bvm=bv.58187178,d.ZGU&psig=AFQjCNHu3kqchJMdgDMh73oMLPi1adqh7g&ust=1388461802726553
http://pilatesvanessamolina.com/wp-content/uploads/2013/04/Pregas-Vocais-Ou-Cordas-Vocais.jpg
http://askabiologist.asu.edu
http://histpetroleo.no.sapo.pt/metodo_sismico_te_ma.jpg
http://www.scielo.br/img/fbpe/rboto/v68n5/a25fig1a.gif
http://www.scielo.br/img/fbpe/rboto/v68n5/a25fig1b.gif
http://www.algosobre.com.br/images/stories/fisica/velocidade_do_som_04.gif
http://www.corposaun.com/wp-content/uploads/2011/04/orelha.jpg
http://www.alvoacustico.pt/alvoacustico/images/Equipamentos/Sonometros/sc-20c.jpg
http://www.phonak.com/br/b2c/pt/hearing/understanding_hearingloss/types_of_hearing_loss/_jcr_content/content/textimage/image.resize.640.499.jpg/1332441043236.jpg/406501620.jpg
http://www.img.lx.it.pt/~fp/cav/ano2007_2008/MEEC/Trabalho_18/MP3/index_ficheiros/image2066.gif
http://files.linguagestual.webnode.pt/200000004-c0207c11aa/Capturer2.JPG