{"id":4950,"date":"2019-06-18T10:30:04","date_gmt":"2019-06-18T08:30:04","guid":{"rendered":"https:\/\/demdlx704as001.ad.harman.com\/index.php\/section\/impulse-response\/"},"modified":"2024-06-05T14:51:49","modified_gmt":"2024-06-05T12:51:49","slug":"impulse-response","status":"publish","type":"post","link":"https:\/\/audioworx.transfunnel.co\/old\/?p=4950","title":{"rendered":"Impulse Response"},"content":{"rendered":"<p>The acoustic transmission path from the loudspeaker to the microphone is usually referred to as a \u201csecondary path\u201d of the ANC system, whereas the acoustic transmission path from the noise source to the microphone is usually referred to as a \u201cprimary path\u201d of the ANC system. The corresponding process for identifying the transfer function of the secondary path is referred to as \u201csecondary path system identification\u201d. In this context, this is the transfer of sound from the algorithm output (via speakers) to the algorithm input (via error microphone). This measurement represents the acoustic transmission path from the acoustic loudspeaker to the error microphone is applied to the FXLMS algorithm. The frequency response (i.e., magnitude response and phase response) of the secondary path system of the ANC system may have a considerable impact on the convergence behavior of the algorithm\u2019s adaptive filter, and thus on the stability and the speed of the adaptation.<\/p>\n<ul>\n<li>Read DSP \u2013 read impulse response data from DSP<\/li>\n<li>Write DSP \u2013 write impulse response to DSP<\/li>\n<li>Mic and Spic radio buttons \u2013 is used for switching between microphones and speakers to see visualization of data for selected mic and spic<\/li>\n<\/ul>\n<h4>IR Settings<\/h4>\n<ul>\n<li>Loudspeaker \u2013 loudspeaker from which will be send signal<\/li>\n<li>Microphone \u2013 microphone to which will be send the signal<\/li>\n<li>Gain \u2013 value of gain<\/li>\n<li>Save to flash \u2013 if the data should be saved in the device flash<\/li>\n<li>Start IR \u2013 start generating impulse response according to the settings above<\/li>\n<\/ul>\n<p>From main menu user can export and import time domain and frequency domain data to the file.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-4949\" src=\"https:\/\/audioworx.transfunnel.co\/old\/wp-content\/uploads\/2019\/06\/1-9.png\" alt=\"\" width=\"1247\" height=\"446\" \/><\/p>\n<p class=\"note\">The graphs in the impulse response tab are plotted based on the values from the following state variables<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-11765\" src=\"https:\/\/audioworx.transfunnel.co\/old\/wp-content\/uploads\/2019\/06\/SVValues.png\" alt=\"\" width=\"238\" height=\"144\" \/><\/p>\n<p class=\"note\">Make sure the number of microphones in the mixer settings is equal to m_NumElements(&#8216;# of Mics:&#8217; fromAudio Object property section).<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-28714\" src=\"https:\/\/audioworx.transfunnel.co\/old\/wp-content\/uploads\/2019\/06\/Impulse.png\" alt=\"\" width=\"1269\" height=\"583\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The acoustic transmission path from the loudspeaker to the microphone is usually referred to as a \u201csecondary path\u201d of the ANC system, whereas the acoustic transmission path from the noise source to the microphone is usually referred to as a \u201cprimary path\u201d of the ANC system. The corresponding process for identifying the transfer function of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","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":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","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":"0","ocean_menu_typo_font_family":"0","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":"default","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":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","footnotes":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[]},"categories":[1],"tags":[],"coauthors":[165],"_links":{"self":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/4950"}],"collection":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4950"}],"version-history":[{"count":5,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/4950\/revisions"}],"predecessor-version":[{"id":28746,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/4950\/revisions\/28746"}],"wp:attachment":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4950"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcoauthors&post=4950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}