{"id":13640,"date":"2021-08-24T08:59:59","date_gmt":"2021-08-24T06:59:59","guid":{"rendered":"https:\/\/demdlx704as001.ad.harman.com\/?p=13640"},"modified":"2024-02-01T09:27:22","modified_gmt":"2024-02-01T08:27:22","slug":"loudness-cao","status":"publish","type":"post","link":"https:\/\/audioworx.transfunnel.co\/old\/?p=13640","title":{"rendered":"Loudness CAO"},"content":{"rendered":"

1. Introduction: <\/strong><\/p>\n

Loudness is used to improve the perception of audio. It is also referred as Loudness compensation or Loudness equalization.<\/p>\n

Human auditory response is sensitive to the sound pressure level . When audio is played at certain sound pressure level all the frequencies are not equally perceived at the same level. In order to equalize perception of audio at all frequencies different gains needs to be
\napplied at these frequencies. The amount of gain required to be applied is function of signal level.<\/p>\n

2. Signal Flow Description:<\/strong><\/p>\n

Loudness CAO is designed to apply different gains at certain frequency bands. Amount of gain applied is based on
\nVolume level. Usually Gain is applied at low and high frequency bands. Usually more gain is\u00a0 applied at low volume levels.
\nLoudness CAO uses below audio objects
\n1. ToneControlExtended
\n2. LUT<\/p>\n

1. ToneControlExtended
\nLoudness CAO uses ToneControlExtended AO to apply the gain in certain frequency bands.
\n3-band ToneControlExtended is used. \u201cFreq\u201d, \u201cGain\u201d and \u201cQ-factor\u201d for each band of ToneControlExtended can
\nbe tuned to get desired frequency response. Tuning parameter Filter type for each band can be shelving,
\nparametric<\/p>\n

2. LUT
\nLUT is used to store the tuning parameters Freq, Gain and Q-factor of ToneContolExtended AO. Tuning
\nparameter for different volume level are stored in LUT table. There are 51 tuning sets, each tuning set is 3 band
\nTone Control. The tuning set is selected based on ControlIn connected to LUT. ControlIn pin has to be driven by
\nvolume control. ControlIn can take value from 0 to 100 corresponds to 0% or mute 100 corresponds to 100% or
\nfull volume
\nLoudness CAO is designed for stereo input and output<\/p>\n

3. Tuning Panel:<\/strong>
\nPlease refer below SFD of Loudness CAO.In SFD TonecontrolExtended is named as \u201cLoudness3Bands_1_0_1\u201d<\/p>\n

 <\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

1. Introduction: Loudness is used to improve the perception of audio. It is also referred as Loudness compensation or Loudness equalization. Human auditory response is sensitive to the sound pressure level . When audio is played at certain sound pressure level all the frequencies are not equally perceived at the same level. In order to […]<\/p>\n","protected":false},"author":75,"featured_media":0,"comment_status":"open","ping_status":"open","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":"","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":"default","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":"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":"","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":"off","ocean_gallery_id":[]},"categories":[178,227],"tags":[],"coauthors":[275],"_links":{"self":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/13640"}],"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\/75"}],"replies":[{"embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13640"}],"version-history":[{"count":7,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/13640\/revisions"}],"predecessor-version":[{"id":26901,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=\/wp\/v2\/posts\/13640\/revisions\/26901"}],"wp:attachment":[{"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13640"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/audioworx.transfunnel.co\/old\/index.php?rest_route=%2Fwp%2Fv2%2Fcoauthors&post=13640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}