Here is a demonstration of a student playing flute into a flame tube: on youtube
It is a wonderful demonstration. Maybe by the next time I teach this I'll be able to buy a frequency generator!!!
Sunday, February 22, 2009
Flame Tube
Here is a demonstration of a student playing flute into a flame tube: on youtube
It is a wonderful demonstration. Maybe by the next time I teach this I'll be able to buy a frequency generator!!!
Monday, February 16, 2009
Supersonic
Above picture is of a jet cracking the sound barrier:
The term supersonic is used to define a speed that is over the speed of sound (Mach 1). At a typical temperature like 21 °C (70 °F), the threshold value required for an object to be traveling at a supersonic speed is approximately 344 m/s, (1,129 ft/s, 761 mph or 1,238 km/h). Speeds greater than 5 times the speed of sound are often referred to as hypersonic. Speeds where only some parts of the air around an object (such as the ends of rotor blades) reach supersonic speeds are labeled transonic (typically somewhere between Mach 0.8 and Mach 1.2).
Sounds are travelling vibrations (pressure waves) in an elastic medium. In gases sound travels longitudinally at different speeds, mostly depending on the molecular mass and temperature of the gas; (pressure has little effect).
New Sesmester, New Topics
Hello, a new semester and new topics.
Waves:
Vocabulary waves: frequency, wavelength, amplitude, trough, crest, compressional wave, transverse wave, and more.
Objectives: Be able to differentiate compressional and transverse waves.
Be able to label a picture like that above.
Sound:
Vocabulary sound: decibels (dBs), compressional wave, ultrasound technology, compression and rarefraction, resonance, pitch, frequency, and more.
Objectives:
Know what raising the amplitude of a wave will have an affect on the sound.
Know what increasing the size of the wavelength does to the sound we hear.
Know the decibel scale and what levels do damage to a person's hearing.
Describe hat is going on with the changes made in the flame waves in the roubins tube
Human ear: Be able to identify all the parts below: (stirrup, anvil, ear, eustacian tube, pinna, cochlea, eardrum, nerve cords, outer ear canal
Waves:
Vocabulary waves: frequency, wavelength, amplitude, trough, crest, compressional wave, transverse wave, and more.
Objectives: Be able to differentiate compressional and transverse waves.
Be able to label a picture like that above.
Sound:
Vocabulary sound: decibels (dBs), compressional wave, ultrasound technology, compression and rarefraction, resonance, pitch, frequency, and more.
Objectives:
Know what raising the amplitude of a wave will have an affect on the sound.
Know what increasing the size of the wavelength does to the sound we hear.
Know the decibel scale and what levels do damage to a person's hearing.
Describe hat is going on with the changes made in the flame waves in the roubins tube
Human ear: Be able to identify all the parts below: (stirrup, anvil, ear, eustacian tube, pinna, cochlea, eardrum, nerve cords, outer ear canal
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