{"id":3969,"date":"2023-01-09T10:43:25","date_gmt":"2023-01-09T10:43:25","guid":{"rendered":"https:\/\/8thclass.deltapublications.in\/?page_id=3969"},"modified":"2025-11-21T09:47:21","modified_gmt":"2025-11-21T09:47:21","slug":"s-13-a-sound-is-produced-by-a-vibrating-body","status":"publish","type":"page","link":"https:\/\/8thclass.deltapublications.in\/index.php\/s-13-a-sound-is-produced-by-a-vibrating-body\/","title":{"rendered":"s-13.a Sound Is Produced By A Vibrating Body"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Sound Is Produced By A Vibrating Body<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div style=\"position: relative; width: 100%; height: 0; padding-top: 56.2500%;\n padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden;\n border-radius: 8px; will-change: transform;\">\n  <iframe loading=\"lazy\" style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;\"\n    src=\"https:\/\/www.canva.com\/design\/DAF63cPZvmY\/FY3idU220jyZNDesxgtRYQ\/watch?embed\" allowfullscreen=\"allowfullscreen\" allow=\"fullscreen\">\n  <\/iframe>\n<\/div>\n<a href=\"https:&#x2F;&#x2F;www.canva.com&#x2F;design&#x2F;DAF63cPZvmY&#x2F;FY3idU220jyZNDesxgtRYQ&#x2F;watch?utm_content=DAF63cPZvmY&amp;utm_campaign=designshare&amp;utm_medium=embeds&amp;utm_source=link\" target=\"_blank\" rel=\"noopener\">sound is produced by a vibrating body<\/a> by Delta publications\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-8550df6181cd5d83aa7a08ef336a4ca1\" style=\"color:#74008b\">Key Notes :<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-78d4d54d21f5c8362c81b458336a7485\" style=\"color:#000060\"><strong>Definition of Sound<\/strong>:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"820\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-42-1024x820.png\" alt=\"\" class=\"wp-image-18295\" style=\"width:295px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-42-1024x820.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-42-300x240.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-42-768x615.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-42-1536x1229.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-42-2048x1639.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-42-1568x1255.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Sound is a form of energy that travels through a medium (like air, water, or solids) in the form of waves. It is produced when an object vibrates.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-c855aee3db050d03020054f4d39c92f3\" style=\"color:#000060\"><strong>Vibration as the Source of Sound<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>All sounds originate from vibrating objects. A vibration is a back-and-forth motion that creates sound waves in the surrounding medium.<\/li>\n\n\n\n<li>For example, when you pluck a guitar string, it vibrates and produces sound.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-25922b21e6c1400f2fd757e1dfd5fc8b\" style=\"color:#000060\"><strong>How Sound is Produced<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>When an object vibrates, it causes nearby air particles to move, creating compressions (areas of high pressure) and rarefactions (areas of low pressure). This creates a sound wave that travels through the air.<\/li>\n\n\n\n<li>The human ear detects these sound waves as they enter through the ear canal.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-9d90a7c27ca6487dc2142c84708cb0ef\" style=\"color:#000060\"><strong>Examples of Vibrating Bodies Producing Sound<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Musical Instruments<\/strong>: Drums (vibrating drum skin), flutes (vibrating air column), and pianos (vibrating strings).<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-43-1024x683.png\" alt=\"\" class=\"wp-image-18296\" style=\"width:396px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-43-1024x683.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-43-300x200.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-43-768x512.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/image-43.png 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Human Voice<\/strong>: Sound is produced when air from the lungs passes through the vocal cords, causing them to vibrate.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"363\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/a6abc823-f3ec-4ee1-8818-00f5acbf9745.jpg\" alt=\"\" class=\"wp-image-18300\" style=\"width:441px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/a6abc823-f3ec-4ee1-8818-00f5acbf9745.jpg 640w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/a6abc823-f3ec-4ee1-8818-00f5acbf9745-300x170.jpg 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Tuning Fork<\/strong>: When struck, its prongs vibrate, generating sound waves.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-502c7e3582fe6d82a548b7b5f0544eba\" style=\"color:#000060\"><strong>Experiment to Demonstrate Sound Production<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Take a <strong>tuning fork<\/strong> and strike it against a hard surface. Place it near your ear or dip it in water to observe the vibrations.<\/li>\n\n\n\n<li>The water shows ripples, indicating that the vibrations produce sound waves.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-09b996116d43cbb712702d75a49942cf\" style=\"color:#000060\"><strong>Medium Required for Sound Transmission<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Sound needs a medium (solid, liquid, or gas) to travel. It cannot travel in a vacuum since there are no particles to carry the sound waves.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-0b1119330cf87b6e43c92d0a0c7d5f1d\" style=\"color:#000060\"><strong>Speed of Sound in Different Mediums<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The speed of sound varies depending on the medium:\n<ul class=\"wp-block-list\">\n<li>Fastest in solids (e.g., steel)<\/li>\n\n\n\n<li>Slower in liquids (e.g., water)<\/li>\n\n\n\n<li>Slowest in gases (e.g., air)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-7cc19cf795e44c75abfed4a5ccc22a74\" style=\"color:#000060\"><strong>Characteristics of Sound Waves<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Frequency<\/strong>: The number of vibrations per second, measured in Hertz (Hz). It determines the pitch of the sound.<\/li>\n\n\n\n<li><strong>Amplitude<\/strong>: The height of the sound wave determines its loudness. Larger amplitude means a louder sound.<\/li>\n\n\n\n<li><strong>Wavelength<\/strong>: The distance between two compressions or rarefactions in a sound wave.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-a44040bb33dc7b62d2417fbfd44824b3\" style=\"color:#000060\"><strong>Fun Fact<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Echo<\/strong>: When sound waves hit a hard surface and reflect back, they produce an echo. The time delay helps calculate the distance of the object.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81283\/866\/867\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-118.png\" alt=\"\" class=\"wp-image-7879\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-118.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-118-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-118-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81360\/348\/205\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-117.png\" alt=\"\" class=\"wp-image-7880\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-117.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-117-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-117-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Sound Is Produced By A Vibrating Body sound is produced by a vibrating body by Delta publications Key Notes : Definition of Sound: Vibration as the Source of Sound: How Sound is Produced: Examples of Vibrating Bodies Producing Sound: Experiment to Demonstrate Sound Production: Medium Required for Sound Transmission: Speed of Sound in Different Mediums:<a class=\"more-link\" href=\"https:\/\/8thclass.deltapublications.in\/index.php\/s-13-a-sound-is-produced-by-a-vibrating-body\/\">Continue reading <span class=\"screen-reader-text\">&#8220;s-13.a Sound Is Produced By A Vibrating Body&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3969","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_hostinger_reach_plugin_has_subscription_block":false,"_hostinger_reach_plugin_is_elementor":false,"_links":{"self":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3969","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3969"}],"version-history":[{"count":20,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3969\/revisions"}],"predecessor-version":[{"id":22367,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3969\/revisions\/22367"}],"wp:attachment":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}