Lesson 7 — Wave calculations

• Sound
• Middelbare school
• havo, vwo
• Leerjaar 2

This lesson

• Reading wave forms.
  
• Discussing the homework.
  
• Calculating wave speed and frequency.
  
• The distinct sound of a musical instrument.

Learning goals

• Name the formula for calculating frequency and be able to apply it in calculations.

• Name the formula for wave speed and be able to apply it in calculations.
  

•  Apply these two new formula's in beginner and more advanced calculations.

• Explain how instruments get their distinct sound.
  

v=f⋅λ

f=​T​​1​​

Practice exercises

•  A wave has a period of 0,25 seconds. Calculate the frequency of this wave

• A wave has a frequency of 440 Hz. Calculate the period of this wave.

• A wave has a period of 5 seconds. Calculate the frequency of this wave.

•  A wave has a period of  0,45 seconds and a wavelength of 6 meters. Calculate the wave speed of this wave.

Worksheet — wave calculations 

v=f⋅λ

f=​T​​1​​

The distinct sound of 

musical instruments

Harmonics

Worksheet — wave calculations 

v=f⋅λ

f=​T​​1​​

Practice exercises

•  A wave has a period of 0,25 seconds. Calculate the frequency of this wave

• A wave has a frequency of 440 Hz. Calculate the period of this wave.

• A wave has a period of 5 seconds. Calculate the frequency of this wave.

•  A wave has a period of  0,45 seconds and a wavelength of 6 meters. Calculate the wave speed of this wave.