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# Sound and more sound

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mydestinationtraining.com

mydestinationtraining.com

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### Transcript

• 1. &#xF09E; Making Sound Waves:&#xF09E; A sound wave begins with a vibration.&#xF09E; How Sound Travels:&#xF09E; Like other mechanical waves, sound waves carry energy through a medium without moving the particles of the medium along.
• 2. &#xF09E; Reflection:&#xF09E; Sound waves may reflect whenthey hit a surface&#xF09E; Diffraction:&#xF09E; Have you sound waves can alsodiffract, bend around corners,this is why you can hear someonetalking around the corner beforegoing around the corner.&#xF09E; Interference:&#xF09E; Sound waves may meet and interactwith each other.
• 3. &#xF09E; Elasticity:&#xF09E; If you stretch a rubber bandand then let it go, it returns to its original shape,however when you stretch modeling clay it staystretched elasticity is the ability of materialbouncing back after being disturbed.&#xF09E; Density:&#xF09E; Density is how much matter,or mass there is in a given amount of space, orvolume&#xF09E; Temperature:&#xF09E; In a given medium,sound travels more slowly at a lower temperature.At a low temperature the particles of a medium moremove slowly then at a high temperature.
• 4. &#xF09E; Energy of a Sound Wave:&#xF09E; in general the greater the energy used&#xF09E; to make the sound the louder the sound.&#xF09E; Distance From a Sound Source:&#xF09E; loudness increases the closer you are&#xF09E; to the sound source.&#xF09E; Measuring Loudness:&#xF09E; The loudness of different sounds is compared&#xF09E; using a unit call the decibels (dB).
• 5. &#xF09E; Pitch and Frequency:&#xF09E; Sounds with a high frequency have a high pitch,sounds with a low frequency have a low pitch.&#xF09E; Changing Pitch:&#xF09E; Pitch is an important property off music becausemusic usually uses specific pitches called notes.
• 6. &#xF09E; What Causes The Doppler Effect:&#xF09E; When a sound source moves the frequencyof the waves changes because the motionof the source adds to the motion of the waves.&#xF09E; What Causes Shock waves:&#xF09E; When the plane travels almost as fast as thespeed of sound the sound barrier is broken
• 7. &#xF09E; Fundamental tones and overtones:&#xF09E; You may recall that standing waves occur whenwaves with just the right frequency interfere as theyreflect back and forth.&#xF09E; Resonance:&#xF09E; Resonance affects the soundquality of a musical instrument by increasing the loudnessof certain overtones.
• 8. &#xF09E; Stringed Instruments:&#xF09E; The guitar and violin are stringedinstruments.&#xF09E; Wind Instruments:&#xF09E; Wing instruments include brass instrumentsSuch as trumpets and woodwind instruments suchas clarinets.&#xF09E; Percussion Instruments:&#xF09E; Percussion instruments include drums bellscymbals and xylophones.
• 9. &#xF09E; Acoustics is used in the design of correct halls to reverberation and interference.
• 10. &#xF09E; Outer Ear:&#xF09E; The outer part of you ear actsas a funnel and collects sound.&#xF09E; Middle Ear:&#xF09E; Behind the ear drum isthe middle ear, the middle ear contain 3 ofthe smallest bones in you body called thehammer, the anvil, and stirrup.&#xF09E; Inner Ear:&#xF09E; A membrane separates themiddle ear form the inner ear the thirdsection of the ear.
• 11. &#xF09E; Causes of Hearing Loss:&#xF09E; hearing loss can occur suddenly if the eardrumis damaged or punctured&#xF09E; Hearing Aid:&#xF09E; For some types of hearing lossthe hearing aids can restore some ability to hear.
• 12. &#xF09E; Bats:&#xF09E; Bats can use ultrasound waves withfrequencies up to 100,000 Hz to movearound and hunt.&#xF09E; Dolphins, Porpoises, Whales:&#xF09E; Dolphins, porpoises, and whales something haveto hunt in the darkness so like the bats they useecholocation ultrasounds up to 150,00 Hz
• 13. &#xF09E; Sonar:&#xF09E; A system that uses reflected sounds waveto detect and locate objectsunderwater is called sonar.&#xF09E; Ultrasound Imagine:&#xF09E; Doctors use ultrasound imaging to look inside&#xF09E; the human body.
• 14. &#xF09E; Microphone: The microphone converts acoustic sound energy into electrical energy. Some hearing aids use two microphones to help separate background noise.&#xF09E; Processor: The processor digitizes the acoustic sound, then separates background noise from speech. Both are processed to make speech clearer and to reduce the interference of background noise.&#xF09E; Amplifier: The amplifier boosts the processed signal according to the pattern and severity of your hearing loss, as well as the amount of background noise.&#xF09E; Speaker: The speaker converts the electrical signal back into acoustic sound and directs the sound into your ear canal. Some models have the speaker placed in your ear canal. Some use a tube that connects the speaker to plug or custom ear mold. Others have the components housed in a custom-fitting shell.&#xF09E; Battery compartment: The battery powers the electronic components. The battery compartment is used to turn the hearing aid on and off.&#xF09E; Optional controls: Some models have a volume control to regulate the volume. Others have a program control, enabling you to change the processing for different listening situations, such as high background noise or music. These controls are available on the hearing aids or on a remote control.
• 15. &#xF09E; Sound quality is a blend tones.
• 16. &#xF09E; Ultrasound is used to look inside human bodies like if a woman if pregnant you can see the baby inside and all(: