Mira's Science Blogs

Difference between Analog and Digital Signal by Tech Differences Summary: Analog devices are representations of something else. For example, an analog camera takes a picture of something, but the picture is not the real thing, it is simply a representation. Most analog signals have infinite possibilities, just as how there is an infinite number of colors in our world. This compares to digital signals, which have a set amount of values, and are not infinite. Digital displays automatically show readings on LCD displays, rather than by using pointers and dials. They are much quicker and easier to use than analog and store more information in less space. We see the combination of both analog and digital in our daily lives. Sampling is when you convert an analog signal to digital. Sampling means splitting in regular interval to convert it in digital form. This is an analog-to-digital conversion. When you convert an analog signal to digital, the analog signal i...

https://docs.google.com/drawings/d/1QVyJgobcp8fx0F6lCUDkFspbIOKWa5oMaGYSazD-XUw/edit?usp=sharing Summary The appearance of sound wave changes when the pitch changes. This means that the waves become closer together (wavelength decreases) when the pitch is higher. When the waves are farther apart (larger wavelength) the pitch is lower. The louder the wave, the higher the amplitude. This means that the wave is higher and it lasts longer. The quieter that a sound is, the less amplitude the wave has and the shorter it lasts.  The relationship between frequency and pitch is that the higher the frequency, the higher the pitch of the note, the lower that the frequency is the lower than the pitch of the note is. We already know that sound travels through the movement of molecules. If there are more vibrations occurring, they cause more molecules to hit each other at a faster time, influencing the pitch of the note. Backward-Looking What process did you go through to produc...

Sound Energy - Musical Instruments by SolPass Summary We understand how sound is produced, and how sound waves can travel through different mediums, but how do musical instruments produce sound? There are hundreds of instruments in the world, producing various pitches, tones, and chords. There are three main types of instruments: wind, percussion, and string. The sound is produced differently based on the type of instrument. The first type of instrument is a string instrument. In a string instrument, the sound is created from the vibration of strings. For example, when you play guitar, you pull on the strings. As the strings vibrate, the air molecules start vibrating as well, producing sound. The next type of instruments are wind and brass instruments and are made when we blow sound into them. The shape and position of the instrument affect the overall tone and pitch. The most common kind of wind instrument is a reed instrument. Blowing on the reed causes it to vib...

How Sound Travels by Knowitall.org Summary Unlike electromagnetic waves, sound waves require a medium to travel through. Sound waves travel through the vibration of molecules in a medium or matter. This kind of wave can travel through solids, liquids, or gases, but the placement of molecules in each substance affects the speed of travel. The molecules placed in a solid are very close together, almost touching. The sound waves can travel quickly through solids because the particles are very tight. This allows the sound wave to move from one molecule to another efficiently without losing energy. The molecules placed in a liquid are still close, but slightly farther than that of a solid substance. This means that when sound waves go through a liquid substance, some of the energy is used to push the particles next to each other. This happens because sound does not have the ability to travel through gaps in the molecules. The molecules are far apart in a gas. This means...

Ear Tubes by Mountain West ENT “What effect can very loud music have on your hearing?” In your answer provide specific evidence, including organ names to help substantiate your claim. Have you ever heard a shrill ringing in your ears? This ringing is due to listening to very loud noises. Believe it, or not, but the major cause of a loss of hearing is listening to loud music. By listening to loud sounds, such as loud music, you can damage your ear hairs, which can impact your hearing forever. As sound reaches the outer ear, it goes through the ear canal and to the middle ear. The middle ear then turns the sound waves into vibrations go to the inner ear. The eardrum vibrates when sound waves reach the eardrum. This causes the movement of the hammer, anvil, and the stirrup, three incredibly delicate bones in the eardrum. These bound assist the sound as it moves along on its journey to the inner ear. Sound waves come into the inner ear in what is called a vibration and en...