sound physics - arrowhead mr. streufert 2013-14. learning targets a.apply wave concepts to the...
TRANSCRIPT
![Page 1: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/1.jpg)
SoundPhysics - Arrowhead
Mr. Streufert
2013-14
![Page 2: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/2.jpg)
Learning TargetsA. Apply wave concepts to the physical
and perceived characteristics of a sound wave Perform calculations involving speed
and intensity Detect audibility and harmonic
relationships
![Page 3: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/3.jpg)
Learning TargetsB. Relate waveform and FFT graphs to
simple or complex sounds Changes in Frequency Identification of frequencies Explain the multiple frequencies in a
complex tone
![Page 4: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/4.jpg)
Learning TargetsC. Describe and explain sound
phenomena Resonance Patterns of interference creating
change in frequency Doppler Effect
![Page 5: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/5.jpg)
Learning TargetsD. Calculate, predict and relate changes in the
sound characteristics that affect sound phenomena Calculate wavelengths and frequencies of sounds
produced by different instruments (strings, tubes, etc.)
Use interference patterns (standing wave analysis) Calculate the sound wave changes based on the
motion of the source and/or the observer
![Page 6: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/6.jpg)
Learning Targets
![Page 7: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/7.jpg)
Audibility• Audibility: The ability for sound to be
heard
• Sound Test Demonstration
![Page 8: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/8.jpg)
Audibility
• Speed
• Frequency
• Wavelength
![Page 9: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/9.jpg)
Audibility
• Infrasonic: Sounds below 20 Hz
• Ultrasonic: Sounds above 20,000 Hz
![Page 10: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/10.jpg)
Audibility – Range of Hearing
![Page 11: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/11.jpg)
Intensity• Intensity: The amount of power per
unit area– Need to know: • Power of the source of sound• Distance away from source
• Sound Waves travel outward from the source in a sphere
![Page 12: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/12.jpg)
Intensity• Relative Intensity: The intensity of
sound in relation to the threshold of hearing–Measured in decibels– Based on a Logarithmic Scale• Measurements span a very large range of
values
![Page 13: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/13.jpg)
Practice Question #1• If a sound seems to be getting
louder, which of the following is probably increasing?– Intensity– Frequency– Speed of Sound–Wavelength
![Page 14: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/14.jpg)
Practice Question #2• Using the table on the Audibility
Handout, estimate the decibel level of the following sounds:– A cheering crowd at a football game– Background noise in a church– The pages of a book being turned– Light traffic on the road
![Page 15: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/15.jpg)
Practice Question #3• A stereo speaker emits sound waves
with a power output of 10 W. –What is the intensity (W/m2) of the
sound 10 m away?–What is the relative intensity (decibel
level)?
![Page 16: Sound Physics - Arrowhead Mr. Streufert 2013-14. Learning Targets A.Apply wave concepts to the physical and perceived characteristics of a sound wave](https://reader034.vdocuments.net/reader034/viewer/2022051416/56649eff5503460f94c13e4a/html5/thumbnails/16.jpg)
Practice Question #4• What is the power of a sound source if the
intensity at 2.8 m is 5.4 x 10-3 W/m2?