{"id":4323,"date":"2025-08-14T09:44:13","date_gmt":"2025-08-14T07:44:13","guid":{"rendered":"https:\/\/avant4degres.fr\/?page_id=4323"},"modified":"2026-08-13T20:21:06","modified_gmt":"2026-08-13T18:21:06","slug":"isolation-acoustique-1","status":"publish","type":"page","link":"https:\/\/avant4degres.fr\/en\/isolation-acoustique-1\/","title":{"rendered":"Isolation acoustique #1"},"content":{"rendered":"
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Isolation acoustique #1<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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13 ao\u00fbt 2025<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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En acoustique du b\u00e2timent, on distingue deux domaines (image 1) :<\/p>

– la correction acoustique<\/strong>\u00a0: am\u00e9liorer la qualit\u00e9 du son \u00e0 l\u2019int\u00e9rieur d\u2019une pi\u00e8ce\u00a0;<\/p>

– l\u2019isolation acoustique<\/strong>\u00a0: r\u00e9duire la transmission du son au travers d\u2019une cloison ou d\u2019un plancher.<\/p>

Je ne parlerai ici que d\u2019isolation acoustique.<\/p>

L\u2019oreille humaine peut percevoir une grande amplitude de sons, de 20 Hz \u00e0 20 000 Hz<\/strong> (image 2). Le son est produit par la vibration d\u2019un corps. Il se propage \u00e0 travers un milieu o\u00f9 il va rencontrer des perturbations, qui vont cr\u00e9er des zones de compression et de d\u00e9pression, ce qui provoque les oscillations des ondes. C\u2019est la pression acoustique<\/strong>, mesur\u00e9e en Pascal (Pa).<\/p>

La pression acoustique est caract\u00e9ris\u00e9e par\u00a0:<\/p>

– la longueur d\u2019onde \u03bb (m)\u00a0: la distance entre deux zones de compression\u00a0;<\/p>

– la p\u00e9riode T (s)\u00a0: le plus petit intervalle de temps au bout duquel le ph\u00e9nom\u00e8ne se reproduit \u00e0 l\u2019identique\u00a0;<\/p>

– la fr\u00e9quence f (Hz)\u00a0: le nombre d\u2019oscillations par seconde\u00a0;<\/p>

– la c\u00e9l\u00e9rit\u00e9 c (m\/s)\u00a0: la vitesse de propagation de la perturbation, qui d\u00e9pend de l\u2019\u00e9lasticit\u00e9 et de la densit\u00e9 du milieu.<\/p>

On utilise plut\u00f4t le niveau de pression acoustique<\/strong> qui est lui exprim\u00e9 en d\u00e9cibel (dB). Le seuil d\u2019audibilit\u00e9 correspond \u00e0 un niveau de pression acoustique de 0 dB, une conversation \u00e9met \u224860 dB et le seuil de la douleur a \u00e9t\u00e9 fix\u00e9 \u00e0 120 dB (image 3). Si vous avez d\u00e9j\u00e0 manipul\u00e9 un sonom\u00e8tre, vous aurez remarqu\u00e9 les mentions dB(A), dB(B) et dB(C). Il s\u2019agit d\u2019une pond\u00e9ration destin\u00e9e \u00e0 ajuster le niveau de pression par rapport \u00e0 la perception humaine<\/strong> (A : de 25 \u00e0 55 dB, B : de 55 \u00e0 85 dB, C : > 85 dB).<\/p>

\ud83c\udfa8 Les illustrations ont \u00e9t\u00e9 modifi\u00e9es d\u2019apr\u00e8s mes cours d\u2019acoustique du Master \u00c9coconstruction de Cergy.<\/p>

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tJe veux am\u00e9liorer l'acoustique dans mon logement<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Isolation acoustique #1 13 ao\u00fbt 2025 En acoustique du b\u00e2timent, on distingue deux domaines (image 1) : – la correction acoustique\u00a0: am\u00e9liorer la qualit\u00e9 du son \u00e0 l\u2019int\u00e9rieur d\u2019une pi\u00e8ce\u00a0; – l\u2019isolation acoustique\u00a0: r\u00e9duire la transmission du son au travers d\u2019une cloison ou d\u2019un plancher. Je ne parlerai ici que d\u2019isolation acoustique. L\u2019oreille humaine peut […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ocean_front_end_style_editor":"no","ocean_post_layout":"full-width","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"off","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"on","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"off","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","footnotes":""},"class_list":["post-4323","page","type-page","status-publish","hentry","entry"],"yoast_head":"\nIsolation acoustique #1 - Avant 4 degr\u00e9s<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/avant4degres.fr\/en\/isolation-acoustique-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Isolation acoustique #1 - Avant 4 degr\u00e9s\" \/>\n<meta property=\"og:description\" content=\"Isolation acoustique #1 13 ao\u00fbt 2025 En acoustique du b\u00e2timent, on distingue deux domaines (image 1) : – la correction acoustique\u00a0: am\u00e9liorer la qualit\u00e9 du son \u00e0 l\u2019int\u00e9rieur d\u2019une pi\u00e8ce\u00a0; – l\u2019isolation acoustique\u00a0: r\u00e9duire la transmission du son au travers d\u2019une cloison ou d\u2019un plancher. 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