Wind Chimes
Wind chimes produce clear, pure tones when struck by a mallet or suspended clapper. A wind chime usually consists of a set of individual alloy rods, tuned by length to a series of intervals considered pleasant. These are suspended from a devised frame in such a way that a centrally suspended clapper can reach and impact all the rods. When the wind blows, the clapper is set in motion and randomly strikes one or more of the suspended rods-- causing the rod to vibrate and emit a tone.
The pitch of said tone is governed by the length of the rod, but the perceived loudness is affected by many determinants: the force of the clappers impact, the alloy's density and structure, and the speed and direction of the wind (to name a few). Also affecting the loudness is the lack of resonating chamber or hard connection between rods and frame. The chime would certainly be louder, for instance, if the rods were built with the inclusion of small chambers containing a volume of air whose fundamental harmonic was the same as that of the rod-- when struck, the rod would transfer vibration to the enclosed air as well as directly to the atmosphere, resulting in a louder tone. A hard connection between rods and frame would also accomplish this result somewhat; the vibrations of each seperate rod would be commuted to the others, resulting in more vibrating surface area (and hence, more volume).
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It was proposed that if the length of the PVC pipes were to increase, then the sound produced will have a lower amplitude each time because the sound will lose energy as it continues in the pipe for a certain amount of time. However, the data actually showed that with every increase in pipe length, the amplitude got louder as well, thus refuting the hypothesis. These results made sense because what was created inside the PVC pipes was a standing still sound wave, or a resonance wave. These kinds of waves have certain locations on its wavelength in order for the change in sound to be heard, which it usually half a wavelength. With this, the tuning fork is 83.3Hz and a usual wavelength is about 300Hz, 300/83.3 = 3.6 meters, which is about 4 meters (half = 2 meters). So for the change in sound to be heard, the pipes had to be about 2 meters in change according to the frequency of the tuning
A = cross sectional area of the connecting rod. l = length of the connecting rod.
Fly rods are drastically different from spinning rods. Fly rods can be as big a 12 feet long. The longer the rod they farther you can cast. Fly rods are categorized into weight classes. These weight classes determine the sizes and the weight of the rod; the weights range from a 0-weight, all the way to a 14-weight rod; 0 being the smallest and 14 being the biggest; the lower the number on the rod the lighter the rod; they are also more flexible than longer rods; the average trout fisherman uses somewhere between a 3-weight to a 5-weight rod, depending on the size of fish they are trying to catch (Jardine 53-59). Catching a larger fish on a smaller weight rod takes practice, in that fly rods are very delicate. Fly rods will break very easily if too much pressure is put on the tip of the rod, but if used properly will last a lifetime (Jardine 53). On the other hand, spinning rods are quite sturdy. Most all spinning rods are in the six to eight-foot length. Longer rods are typically stiffer than shorter rods. Spinning rods and fly rods come in three different actions: slow, medium, and fast. Slow action rods are more flexible towards the middle of the rod; medium action rods are a less flexible in the middle and start bending three-fourths of the way up the rod fast action rods are stiff most of the way up the rod and are flexible at about the last two feet of the rod (Jardine 53). When
Published in 1964, Gideon's Trumpet is based off a true story of one man's quest to be given the right to have a counsel appointed to him by the court. Constitution's Sixth Amendment declared he had a right to counsel and he fought hard to obtain justice. If Gideon didn't realize that he had a right to counsel, this case would have never been held and the legal sytem might still be the same today! Clarence Earl Gideon is a man that most Americans outside of the legal system, as well as within it, would not even recognize who he was. The author, Anthony Lewis, wanted this change and wanted the citizens of the United States to see the dramatic impact that the Gideon's case had on the legal system. Gideon felt like he was in an unfair situation and filled out a hand-written petition for writ of certiorari to the Supreme Court. Lewis brings to life the story of the man behind the case, preserving an important piece that has forever changed the legal and social history.
...ype of chain reaction. The pressure wave consists of what is known as compressions and rarefactions. The compression parts are areas of high pressure, where the air molecules are compressed into a small space. On the other hand, the rarefactions are areas of low pressure, where the air molecules are spread out. The result of the compressions and rarefactions is a longitudinal sound wave (Henderson).
The Bagpipes have been used continuously through the course of history and throughout many cultures.The history of bagpipes, much like its origins are elusive. The bagpipes were reported to have been played by Roman emperors to French and Scottish kings. Cultures around the world have used the bagpipes in many ceremonial occasions such as weddings, dances, wars, funerals and various other occasions. People have fought hard to keep the essence of piping a-live. Bagpiping’s The bagpipes contributions to society have been great, and no other country has tried harder to preserve its spiritual essence than Scotland.
"Deafening", written by Frances Itani is a meaningful novel written by a talented writer. This novel demonstrates how people deal with war and having certain disabilities. Over the years this has occurred to millions of people who have become deaf or have had loved ones who depart to defend their freedom or others freedom. Frances Itani creates images, and contrasts them to show how there is fear and bravery with going to fight for someone's freedom and the frustration of being the loved one awaiting someone's return. Also the frustration of being deaf and having to deal with the uncertainty of your surrounding. This novel reminds us about the war time and how depressing everything is. We learn that faith and courage and friendship are ideal to continue on with disabilities and during a war.
Ultrasound is sound waves that have a frequency above human audible. (Ultrasound Physics and Instrument 111). With a shorter wavelength than audible sound, these waves can be directed into a narrow beam that is used in imaging soft tissues. As with audible sound waves, ultrasound waves must have a medium in which to travel and are subject to interference. In addition, much like light rays, they can be reflected, refracted, and focused.
momentum transfer when air molecules collide. Our ‘subjective impression’ about the frequency of a sound is called pitch. High pitch has high vibration frequency, while low pitch has a low vibration frequency. A pure musical tone consists of a single pitch or frequency. However, most musical tones are “complex summations” of various pure frequencies - one characteristic frequency, called the fundamental, and a series of overtones or harmonics Younger people can usually hear pitches with frequencies from about 20 hertz (infrasonic) to 20,000 (ultrasonic) hertz. We can’t hear above 20,000 hertz or below 20 hertz (ultra and infrasonic waves).
The distance that a fishing lure or bait can be cast is directly related to the length of the fishing rod and the weight of the lure, bait and any additional weights. Casting is necess...
The Scholar: I think that's more a function of sound wave vibration than anything else.
often done by electrical discharge in a pure gas - or gas mixture - in a tube.
Sound is essentially a wave produced by a vibrating source. This compression and rarefaction of matter will transfer to the surrounding particles, for instance air molecules. Rhythmic variations in air pressure are therefore created which are detected by the ear and perceived as sound. The frequency of a sound wave is the number of these oscillations that passes through a given point each second. It is the compression of the medium particles that actually constitute a sound wave, and which classifies it as longitudinal. As opposed to transverse waves (eg. light waves), in which case the particles move perpendicular to the direction of the wave movement, the medium particles are moving in the same or opposite direction as the wave (Russell, D. A., 1998).
waves are further divided into two groups or bands such as very low frequency (