Introduction | Radiation Force Balances | Measurement | Additional Information | Further Reading

Measurement

Good measurement methods lead to confidence in the results achieved. Because the change in mass being measured is relatively small, difficulties can be encountered due to stability of the balance and it's environment. This section covers some of the common problems encountered when measuring the acoustic power, provides solutions and best practice guidance to avoid significant errors in measurements.

• Setting up and alignment
  
  
• Setting up and alignment - Environment
  
  
• Making a measurement
  
  -  Approximation method
  -  Extrapolation method
  
  
• Measurement effects
  
  
• Uncertainties
  
  -  Random (Type A evaluation)
  -  Systematic (Type B evaluation)
  
  
• Calibration and maintenance