Enjoying this Course?Table of Contents
- 3.1. Introduction
- 3.2. The logarithmic scale
- 3.3. Decibels in the audio field
- 3.4. Inverse distance law
- 3.5. Combination of sound sources
- 3.6. Electrical quantities expressed in decibels
- 3.7. Standard Operating Level
- 3.8. Dynamic range
- 3.9. Sound Level Meters
- 3.9.1. dBspl meters
- 3.9.2. Vu meters
- 3.9.3. PPM meters
This section deals with a subject which often gets a little bit muddled, because there are many definitions involved that can be misleading. However, the concept of decibels is at the heart of sound theory and comes up practically every time we deal with a quantity regarding sound. The reason why it is so important is because the human ear perceives sound pressure logarithmically rather than linearly and therefore it is more convenient to express the quantity levels related to sound amplitude with a logarithmic measuring unit: the decibel.
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