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Sounds as waves
Содержание
- 1. Sounds as waves
- 2. The big picture: “How can we describe
- 3. Task 1Listen to the sounds and describe
- 4. Sound WavesAmplitude – affects the loudness (volume).
- 5. Label a crest, a trough and a wavelength.What is the frequency measured in?
- 6. Sound waves on an oscilloscopeHigh amplitude =
- 7. Short wavelength = high pitched soundLong wavelength
- 8. High frequency = high pitched soundLow frequency
- 9. Task 2: Drawing wavesAll: Fill in the
- 10. Compared to this sound, how are the
- 11. Plenary
- 12. Скачать презентанцию
The big picture: “How can we describe sound waves?”Learning outcomesDescribe the loudness and pitch of sounds.Compare the shape of sound waves as the pitch and amplitude (loudness) are changed.Be able to
Слайды и текст этой презентации
Слайд 1Sounds as waves
Key words: Amplitude, Frequency, Pitch
Starter:
What travels faster sound
or light?
Слайд 2The big picture: “How can we describe sound waves?”
Learning outcomes
Describe
the loudness and pitch of sounds.
Compare the shape of sound
waves as the pitch and amplitude (loudness) are changed.Be able to interpret sounds, and draw the appropriate waves.
Слайд 3Task 1
Listen to the sounds and describe them using the
words frequency and amplitude:
High frequency: High pitched
Low frequency: Low pitched
High
amplitude: LoudLow amplitude: Quiet
Слайд 4Sound Waves
Amplitude – affects the loudness (volume). Louder sounds have
more energy.
Frequency – affects the pitch. Higher frequency the higher
the pitch. The number of complete waves per second is measured in Hertz.
Crest
Trough
Слайд 6Sound waves on an oscilloscope
High amplitude = loud sound
Low amplitude
= quiet sound
Increasing amplitude
Increasing loudness
“The higher the amplitude, the louder
the sound”© Class Leading Ltd. 2013
Free for non-commercial educational use provided that this copyright notice is included.
Слайд 7Short wavelength = high pitched sound
Long wavelength = low pitched
sound
Decreasing wavelength
Increasing pitch
“The shorter the wavelength, the higher pitched the
sound”Sound waves on an oscilloscope
© Class Leading Ltd. 2013
Free for non-commercial educational use provided that this copyright notice is included.
Слайд 8High frequency = high pitched sound
Low frequency = low pitched
sound
Increasing frequency
Increasing pitch
“The higher the frequency, the higher pitched the
sound”Sound waves on an oscilloscope
© Class Leading Ltd. 2013
Free for non-commercial educational use provided that this copyright notice is included.
Слайд 9Task 2: Drawing waves
All: Fill in the gaps to explain
what the key words mean.
Most: Draw waves of different amplitudes
and frequency.Some: Label the waves you have drawn with the correct terms.
LO: Compare the shape of sound waves as the pitch and amplitude (loudness) are changed.
Слайд 10Compared to this sound, how are the other sounds different?
Same pitch
Louder
Higher pitch
Quieter
Higher pitch
Same loudness
2.
Task
3: Drawing sound wavesLO: Be able to interpret sounds, and draw the appropriate waves.
