Leq: What does it mean?

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Leq: What does it mean?

Leq (said “L E Q”) stands for Equivalent Continuous Sound Pressure Level, and is one of the most important sound level metrics. It’s nice because it boils a sound level measurement down to one decibel level number. The Leq represents the total sound energy logged over the course of a measurement.

Since the Leq corresponds with the total sound energy, it is a useful way to predict hearing damage threats as well potential noise complaints. As a result, the Leq is ...

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Are Lpeak and Lmax Different?

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Are Lpeak and Lmax Different?

Newcomers to the field of acoustics are often overwhelmed by the number of different level metrics used to characterize environmental and community noise. To make matters worse, almost all of these metrics are abbreviated with capital Ls and reported in units of decibels. The purpose of this article is to help distinguish between three of these Ls: Lpeak, Lmax, and Lmin. Of the three, Lpeak is the easiest to understand, so we’ll start there.

Lpeak

Lpeak stands for peak level. The peak ...

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Calculating Resonant Frequencies

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Calculating Resonant Frequencies

This article continues from the last article, Introduction to Resonance. If you need to review standing waves, nodes, and antinodes, you might want to check out that article first. Otherwise, let’s get right down to business.

How to Find Resonant Frequencies

Remember from the last article that standing waves happen when nodes or antinodes line up with the ends of a rope or pipe. Such standing waves create resonance. The lowest frequency that “fits” on a string or in a space ...

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Why Don’t My Noise-Canceling Headphones Block All Sounds?

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Why Don’t My Noise-Canceling Headphones Block All Sounds?

Calling headphones noise-cancelling can be deceptive. While it is true that noise-cancelling headphones are capable of counteracting some background noises, they are not perfect for all types of noise. In this article we will discuss the inner workings, limitations, and potential tradeoffs of noise-cancelling headphone technology.

All Headphones are Noise Cancelling

Technically all headphones are noise cancelling on some level. Just as putting your hands over your ears blocks incoming sound, any headphone you put on, in, or over your ear will ...

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Dynamic Microphones: Are They Right for Me?

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Dynamic Microphones: Are They Right for Me?

Microphones are categorized by the way they transform sound energy into electrical energy. In acoustics terms, the process of changing energy from one type to another is called transduction. In this article we will explore the way a dynamic microphone transducer works and what that might mean for choosing the right microphone for your next project.

How Do They Work?

Some confusion about dynamic microphones exists because of the word dynamic. When dynamic is used to describe microphones, it is not referencing ...

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Condenser Microphones: Are They Right for Me?

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Condenser Microphones: Are They Right for Me?

Microphones are a subset of a larger group of devices called transducers, which convert energy from one form to another. In this article, we will take a closer look at condenser microphones to learn how they change acoustic energy to electric energy.

How Do They Work?

You are probably most familiar with the housing of a microphone. It’s the hard outer casing part of the microphone that you can see. It often has a wire frame mesh to protect the inner workings ...

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