Several comments and comprehensive bibliographical references are also provided for each drawn page to enlarge the range of subjects or exercises that can be discussed in courses and foster further readings. Seven drawn pages constitute a visual support to explain the origin and history of the decibel, together with examples from acoustics and other domains on the use of logarithmic scales and classical decibel calculations. It can be used to express a change in value (e.g., +1 dB or 1 dB) or an absolute value. The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale, called the level. This paper is an example of how educational comics can be designed and used to introduce one of the most commonly discussed topics when the basics of acoustics are taught: decibel level. Pitch and Frequency Intensity and the Decibel Scale The Speed of Sound The Human Ear Sound waves are introduced into a medium by the vibration of an object. An example scale showing power ratios, amplitude ratios, and dB equivalents 10 log. While they are valuable resources for researchers, these books might appear a little daunting for a young audience or for people who are new to acoustics. A sound 1,000 times more powerful than near total silence is 30 dB, 40 dB and so on. A sound 100 times more powerful than near total silence is 20 dB. In fact, the fields of acoustics cover an especially broad range of subjects and domains, and comprehensive acoustics textbooks are usually quite thick as a consequence. On the decibel scale, the quietest audible sound (perceived near total silence) is 0 dB. The decibel scale is logarithmic, meaning it increases by the power of 10 each time. Acoustics is generally defined as the science that deals with the production, transmission, and reception of sound and the understanding and control of its effects. The decibel scale is incredibly large because ears are so sensitive to soundpeople with normal hearing can hear anything from a light touch on skin to the roar of a plane’s engine.
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