# Why is the Sabine equation considered an equation, but not a law?

• I
• Mohamed Nabil

#### Mohamed Nabil

Hello brothers,
I have been studying much of acoustics recently, and I've been confronted by the following question:

why Sabine equation is not a law?
I mean, It has been used and experimented under certain conditions, and as I get it, that's what you need to call an equation a Law.

I'll appreciate your help among that.
Thank you all,,,

Whether something is a called law or not is mostly just a historical accident. In the past it was more fashionable to call solidly established results laws and nowadays it is less so.

• Klystron
Wallace Sabine had an acoustics unit, the sabin, named for his contributions to physics.
A unit of acoustic absorption equivalent to the absorption by one square foot of a perfect absorber.

## 1. Why is the Sabine equation considered an equation?

The Sabine equation is considered an equation because it is a mathematical representation of a relationship between variables. It follows the basic format of an equation, with both sides being equal to each other and using mathematical operations to solve for a specific variable.

## 2. What is the difference between an equation and a law?

An equation is a mathematical representation of a relationship between variables, while a law is a scientific principle that describes a natural phenomenon. Laws are typically derived from equations, but they are more general and have been experimentally proven to be universally valid.

## 3. Why is the Sabine equation not considered a law?

The Sabine equation is not considered a law because it is a specific mathematical representation of a relationship between sound absorption and room acoustics. It is not a general principle that can be applied to all acoustic environments, as it only applies to rooms with uniform sound absorption materials.

## 4. Can the Sabine equation be applied to all acoustic environments?

No, the Sabine equation can only be applied to rooms with uniform sound absorption materials. It does not account for other factors such as room shape, non-uniform sound absorption, or sound reflections, which can significantly affect sound absorption in different acoustic environments.

## 5. Are there other equations or laws that describe sound absorption in acoustic environments?

Yes, there are other equations and laws that describe sound absorption in acoustic environments, such as the Eyring equation and the Delany-Bazley model. However, these equations also have limitations and may not accurately describe all acoustic environments. Therefore, it is important to carefully consider the variables and assumptions used in these equations when applying them to a specific acoustic environment.