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Sound is the term to describe what is heard when sound waves pass through a medium to the ear. All sounds are made by vibrations of molecules through which the sound travels. For instance, when a drum or a cymbal is struck, the object vibrates. These vibrations make air molecules move. See the fact file below for more information about sound.
- Sound is energy that is made by vibrations. When any object vibrates, it causes the particles to move in the air. The air particles then bumps into each other and then bump into others. This continued bumping cause a sound wave. Therefore, ears hear the sounds. When these particles move fast, a high volume of sound is formed. And then, when these particles move slowly, a low volume of sound is produced.
- If the human ear is within the range of the vibrations, a sound can be heard.
- Sound waves are also known as pressure waves because the wave moves the particles along its passa
- The ear is not the only detector people and animals have. Sound waves can even be felt by different parts of the body. Sometimes you can feel the vibrations thunder makes while you are actually hearing it.
- Musical sounds are composed of regular and uniform sound vibrations. Music can be described as a beautiful or expressive arrangement of sounds. Noises are formed by irregular and disordered sound vibrations.
- If you fear noise, then you have Acousticophobia.
- If you fear music, then you have Melophobia.
- Stringed instruments are played when fingers or a bar are pressed down on the strings. This pressure changes the string’s length, causing them to vibrate at different frequencies and make different sounds. Shortening a string makes it sound higher, while lengthening a string can produce a lower sound. Strings also produce different sounds depending on how thick they are.
- In wind instruments, there is a reed – a thin piece of wood inside the mouthpiece, which vibrates when air travels over it. The keys produce different size openings in the instrument. The air columns inside the instrument are then made shorter or longer which produces different sounds.
- Our ears serve as a bridge for sound waves to pass. The human ear that attaches to both sides of the head acting as a funnel to catch even the tiniest sound around. The inner ears, eardrums and tiny bones inside the ear, called the hammer, anvil and stirrup all begin to vibrate as the sound waves start to enter the inner ear. Sound vibrations then move through an oval opening, called the cochlea. In the cochlea–a snail shell-like, fluid-filled chamber–the sound waves stimulate tiny hairs that are connected to the auditory nerve or the hearing-nerve. The auditory nerve receives signals from the nerve cells and transmits them to the auditory center in the brain.
- The brain receives these messages from the auditory nerve. The messages come in fast and furious, in a jumble of confusion, but the brain has the ability to sort them into an organized pattern. This way we can understand the sounds we hear as music or human speech.
- A human beings ear hears an audible sound waves, if their frequency ranges from 20 to 20,000 vibrations/second. Subsonic has a frequency that is less than the audible sound waves. Ultrasonic have a frequency higher than the audible sound waves.
- Animals like dogs have a higher frequency of hearing sounds. This capability allows the animals to hear sounds that humans can’t. It is also through this capability why animals can sense oncoming danger.
- Therefore, sound serves as a warning and prepares the animals for defense and attacks.
- Sound travels at a speed of 767 miles/hour or 1,230 kilometers/hour. Sound travels 4.3 times faster in water than air, having a speed of 1,482 meters/second. Sound travels 3 times faster through steel material, having a speed of 4,512 meters/second. Light travels faster than sound, having a speed of 186,000 miles/second or 299792.458 kilometers/second. You can observe a lightning flash coming first before hearing the sound.
- A whale’s voice travels at a maximum speed of 800 kilometers or 479 miles in the water. Dolphins hears sounds from 24 kilometers or 15 miles away underwater.
- Sound waves are scientifically studied. It is technically referred to Acoustics.
- Sound waves can bend around corners and obstacles.
- No sound can travel in a vacuum, which is an area having no air at all.
- Wind has no sound. The wind blowing against an obstacle makes a sound.
- In space, no sound is produced because of the absence of corners and obstacles, where sound waves are supposed to bounce off.
- When sound waves bounced off on objects instead of absorbing the sound waves, you can hear echoes produced. The echo is a reflection of the sound waves produced because of the bouncing off of waves.
- If you have bigger object, where the sound waves will bounce off, then more and louder echo is produced.
- The loudest sound naturally occurs on Earth is the sound coming from a volcano eruption. The Krakatoa eruption in 1883 was recorded to have the loudest sound produced in the world. The sound was heard at a 4,000-mile distance.
- Sound is also considered as an energy. This happens when things vibrates and that vibration travels through the ears. And then, the sounds are recognized. The sound produced during the vibration travels through the matter. When you talk molecules vibrates, producing sound waves that travel to the listener.
- ·Sound vibrations also travel from one matter to another matter. If you are going to tap the table, sound vibration is produced. When you tap, the sound waves pass through the table and then, it will travel going to the ears.
- The absence of matter produces no sound because the sound vibrations do not have a matter to pass through.
- Human beings and animals uses sound as a tool or means of communication. There is an Electrocardiogram, Ultrasonic cleaners and Ultrasound for doctors; Sonar for geologists; Doppler for weather services and Echolocation for navigation of animals.
This bundle contains 11 ready-to-use Sound Worksheets that are perfect for students who want to learn more about Sound which is the term to describe what is heard when sound waves pass through a medium to the ear.
Worksheet Bundle 1
Download includes the following worksheets:
- Sound Facts
- Sound Word Search
- Fact or Bluff
- What am I?
- Musical Instruments
- Sound Acrostic
- Color Paging
- Sound Testing
- Fill in the Blanks
- Exploring the Neighborhood
Worksheet Bundle 2
Download includes the following worksheets:
- Sound Facts
- Busy City Coloring
- Human Hearing Range
- Speed of Sound
- Word Code
- Sounds of the Earth
- Universal Sounds
- Kinds of Sounds
- Sound Reflection
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Use With Any Curriculum
These worksheets have been specifically designed for use with any international curriculum. You can use these worksheets as-is, or edit them using Google Slides to make them more specific to your own student ability levels and curriculum standards.