Sound A form of Energy

Monday 11-October 2010
Sound –A Form of Energy
Sound is a form of energy carried by waves of vibrating particles . These waves are called Sound Waves. They can travel through solids, liquids and gases, but they cannot travel through vacuum as there are no particles to vibrate. For this reason, sound cannot travel out in space.
Sound Waves are longitudinal waves. It means that the particles vibrate in the same direction as the waves travels. Waves frequency is measured in hertz(Hz).Sound waves with frequencies between about 20 and 20,000 hertz can be heard by the human ear and are commonly described as sound. Sound waves below this range re known as infrasound and above it are ultrasound. High sounds such as bird song. Have high-frequency waves, whereas low sounds, such as the rumble made by the engine of a heavy truck, have low-frequency waves. The sound of an aircraft landing measures about 120 dB. Aircraft make such loud sounds that ground crew wear ear protectors to avoid hearing damage.
Loud sounds are waves with a large amplitude. Soft sounds are waves with a small amplitude . as a sound travels farther away from its source, the amplitude becomes smaller and so the sound becomes quieter. The loudness of sound is measured in decibels(dB). The blue whale is the loudest animal in the world. It makes sounds up to 188dB. The sound of falling leaves measures 10 dB.
Speed of Sound: Sound Waves travel at different speeds in different substance. They travel more quickly in solids than in liquids and more quickly in liquids than in gases. The speed of sound waves as they travel through dry air at 0 degree Celsius is 331 meters per second. This speed increases if the air temperature goes up, and decreases if the temperature of the air goes down.
A speed that is faster than the speed of sound in the same conditions is known as a Supersonic Sound. One that is slower is a Subsonic Speed.
Echoes: Echoes are sound waves that have reflected off a surface and are heard shortly after the original sound. Echoes can be used to find the position of objects. When animals such as bats and dolphins use echoes. It is called echo location. They use it to find their way around or to locate prey.
Sonar is the name given to the method used by ships to measure thee depts. Of sea water or to detect underwater objects such as shipwrecks or shoals of fish. The echoes are detected by equipment on board the ship. hoes are also used in Ultrasound Scanning to see inside the body-for example to check on the growth of an unborn baby inside its mother Bone, muscles , and fat all reflect ultrasonic waves differently. A computer uses this information to make a picture.

We lie the loudest when we lie to ourselves.
Chronic Fatigue Syndrome
People with chronic fatigues syndrome are not just tired; there fatigue is debilitating, keeping them away from work and play for months. It is accompanied by lot of symptoms that come and go, including muscle pain, sore throat, tender lymph nodes, headaches and impaired memory. Still doctors are not sure as to what causes chronic fatigues syndrome, but it affect large number of people . one theory suggests that a virus, stress or trauma jump-starts the immune system which remains activate instead of gearing down as it should. As a results , immune factors, (some of which cause fatigues) may remain in high concentration n the blood.
Chronic fatigues syndrome has many similarities to (gibromyalglia) reare disorder of the soft tissues. Some people say these two are the same . People with fibromyalgia also feel tired, but their main complaint is muscles pain.
A Diagnosis of chronic fatigues syndrome is made only after a medical checkup has ruled out other problems . symptoms are usually relieved with pain medications and antidepressants. Moderate exercise also is helpful.
Integrity
I am not bound to win, but I am bound to be true.
I am not bound to succeed, but I am bound to live up to the light I have.
I must stand with anybody that stands right, stand with him while he is right, and part with him when he goes wrong.
True Courage is Cool and Calm
Courage consists , not in blindly overlooking danger, but in seeing and conquering it .
True courage is cool and calm, The bravest of men have the last of a brutal, and in the very time of danger are found the most serene and free.
Courage is considered as an essential of character
Conscience is the root of all true courage, if a man would be brave let him obey his conscience.
Impure Thought
Impure thoughts awaken impure feelings, lead to impure expressions, and beget impure actions and these affect both body and mind and to the ruin of all that is noble and pure in character .
Life must be lived forwards
Life is like playing a violin solo in public and learning the instrument as on plays it.
The business of life is to go forward.
Life can only be understood backwards but it must be lived forwards.
The truth is that happiness is the most powerful of tonics in life.
Quote from The essence of Gita
According the scholars in Europen and America, Indian religion or Indian philosophy speaks of only detachment. It says “Don’t care for anything in this world. Renounce, renounce.” That is way, these scholars feel, a sort of melancholy or depressing tendency is found in the Hindu race, a kind of indifference or lack of enthusiasm for doing anything Hindus have the attitude.” What’s the point in doing anything in this evanescent life?” This has led to laziness and inertia.
How far these ideas are true becomes clear as soon as we study the Gita. I am not referring only Sir Krishna’s repeated instruction to not stop working. We see that Krishna himself demonstrates at every moment of his life intense activity in the midst of intense ret. He does every kind of work, but within him there is extraordinary serenity. It is this state that Krishna refers to as “detachment”
I drive joy
There was a doctor in Benaras who spent 5 minutes in the morning and evening for mediation on God. Knowing this, his colleagues and friends laughed at him. One day they argued that he was wasting ten precious minutes on something, which he had been misled into believing. The doctor replied, “Well, if God does not exist, I agree that I am wasting ten minutes a day. But, if He exists? I am afraid you are wasting your entire lifetime. I prefer to waste ten minutes rather than a lifetime. Why should you grudge me the 10 minutes joy that I derive from? I am not robbing you of your joy; why should you rob me of mine. He asked. The critics were silenced. –Baba- Chinna Katha
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