{"id":13531,"date":"2025-12-06T09:18:51","date_gmt":"2025-12-06T06:18:51","guid":{"rendered":"https:\/\/academia.treesal.com\/?post_type=course&#038;p=13531"},"modified":"2026-03-12T14:24:38","modified_gmt":"2026-03-12T11:24:38","slug":"chapter6","status":"publish","type":"course","link":"https:\/\/academia.treesal.com\/en\/course\/chapter6\/","title":{"rendered":"Chapter5 : Sound and Hearing"},"content":{"rendered":"<section class=\"wp-block-sensei-lms-course-outline sensei-block-wrapper  is-style-default\" style=\"\">\n\t\t\t\t\n\t\t\t<section class=\"wp-block-sensei-lms-course-outline-module sensei-collapsible  is-style-default wp-block-sensei-lms-course-outline-module-bordered border-color-primary\" style=\"border-color: rgb(2, 103, 190);\">\n\t\t\t\t<header class=\"wp-block-sensei-lms-course-outline-module__header has-text-color has-background-color has-background has-primary-background-color\" style=\"\">\n\t\t\t\t\t<h2 class=\"wp-block-sensei-lms-course-outline-module__title\">Chapter5.1 Sound Waves in Media<\/h2>\n\t\t\t\t\t<button type=\"button\" class=\"wp-block-sensei-lms-course-outline__arrow sensei-collapsible__toggle\" aria-expanded=\"true\">\n\t\t\t\t\t\t<svg class=\"\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-up\"><\/use><\/svg>\n\t\t\t\t\t\t<span class=\"screen-reader-text\">Chapter5.1 Sound Waves in Media<\/span>\n\t\t\t\t\t<\/button><\/header>\n\t\t\t\t\t\n\t\t\t\t<div class=\"wp-block-sensei-lms-collapsible sensei-collapsible__content\">\n\t\t\t\t\t\n\t\t\t\t\t<h3 class=\"wp-block-sensei-lms-course-outline-module__lessons-title\">\n\t\t\t\t\t\tLessons\n\t\t\t\t\t<\/h3>\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-1-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-1 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-2-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-2 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-3-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-3 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-4-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-4 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-5-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-5 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-6-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-6 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-1-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-1 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-2-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-2 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-3-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-3 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-4-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-4 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-5-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-5 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-1-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-1 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-2-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-2 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-3-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-3 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-4-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-4 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-1-5-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.1-5 Matching\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/section>\n\t\t\n\t\t\t<section class=\"wp-block-sensei-lms-course-outline-module sensei-collapsible  is-style-default wp-block-sensei-lms-course-outline-module-bordered border-color-primary\" style=\"border-color: rgb(2, 103, 190);\">\n\t\t\t\t<header class=\"wp-block-sensei-lms-course-outline-module__header has-text-color has-background-color has-background has-primary-background-color\" style=\"\">\n\t\t\t\t\t<h2 class=\"wp-block-sensei-lms-course-outline-module__title\">Chapter5.2 : Ultrasound Sonograph<\/h2>\n\t\t\t\t\t<button type=\"button\" class=\"wp-block-sensei-lms-course-outline__arrow sensei-collapsible__toggle\" aria-expanded=\"true\">\n\t\t\t\t\t\t<svg class=\"\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-up\"><\/use><\/svg>\n\t\t\t\t\t\t<span class=\"screen-reader-text\">Chapter5.2 : Ultrasound Sonograph<\/span>\n\t\t\t\t\t<\/button><\/header>\n\t\t\t\t\t\n\t\t\t\t<div class=\"wp-block-sensei-lms-collapsible sensei-collapsible__content\">\n\t\t\t\t\t\n\t\t\t\t\t<h3 class=\"wp-block-sensei-lms-course-outline-module__lessons-title\">\n\t\t\t\t\t\tLessons\n\t\t\t\t\t<\/h3>\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-1-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.2-1 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-2-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.2-2 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-3-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.2-3 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-4-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.2-4 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-5-mcq\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.2-5 MCQ\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-1-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.2-1 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-2-fill-in-blank\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__status\"><\/svg>\n\t\t\t\t<span>\n\t\t\t\t\tCh5.2-2 Fill-in-Blank\n\t\t\t\t\t\n\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t<svg class=\"wp-block-sensei-lms-course-outline-lesson__chevron\"><use href=\"https:\/\/academia.treesal.com\/wp-content\/plugins\/sensei-lms\/assets\/dist\/icons\/sensei-sprite.svg?v=4.25.2#sensei-sprite-chevron-right\"><\/use><\/svg>\n\t\t\t<\/a>\n\t\t\n\t\t\t<a href=\"https:\/\/academia.treesal.com\/en\/lesson\/ch5-2-1-matching\/\" class=\"wp-block-sensei-lms-course-outline-lesson\" style=\"\">\n\t\t\t\t<svg 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