What Is A Decibel? Can 'Negative' Decibels Exist?

The video explains decibels as a unit of measurement for sound, emphasizing their role as a ratio rather than an absolute unit. It highlights the logarithmic nature of decibels, which simplifies dealing with large numerical differences. The video also discusses the application of decibels in human hearing, comparing them to the Celsius scale, and explains how decibels relate to the threshold of human hearing.

Describe how logarithmic scales are useful when discussing decibels.

What does a positive or negative decibel indicate about sound levels?