3.4.3. Total Harmonic Distortion (THD)

Try these first

1. 1.

   What does THD stand for?

   Hint

   Remember, it relates to distortion measurements.

2. 2.

   What is the desired THD value for high-fidelity audio applications?

   Hint

   Think about what quality sound represents!

3. 3.

   What does THD measure?

   • Response time
   • Distortion of a signal
   • Gain of the amplifier

   Hint

   Think about what happens to a signal after it passes through an op-amp.

4. 4.

   A THD value lower than what percentage is generally ideal for high-fidelity audio?

   • 0.5%
   • 1.0%
   • 0.1%

   Hint

   High-quality sound requires low distortion levels.

5. 5.

   You have an op-amp with an output signal that produces 100 mW of fundamental power and 5 mW of harmonic power. Calculate the THD.

   Hint

   Use the THD formula to set up your calculation correctly.

6. 6.

   Discuss the effects of increased THD on both audio fidelity and measurement instruments. Provide examples.

   Hint

   Think about how our senses perceive sound and how measurements need clarity.