Frequency, Pitch and Volume

What Do We Mean When We Talk About Different Sound Frequencies?

Most people are familiar with the word "Pitch", as in the high-pitched sound of the keys on the far right of a piano, or the low-pitched sound of the far left keys. But fewer people are familiar with the technical term "Frequency", although both words are often used in the same discussion - particularly discussions about how to stop unwanted sounds/noises.

From our ears' point of view, they are the same thing. High-frequency waveforms result in high-pitched sound. The same goes for mid, low or mixed waveforms. An 18-wheeler produces low-frequency waveforms resulting in a low pitch sound to our ears. Generally, traffic produces quite a range of pitches from sirens, to Harleys, and everything in-between. Barking dogs vary from the high pitch of small dog, to the low pitch of a big one.

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Why We Use Laminated Glass Instead of Acrylic

We offered 1/4" and 3/8" thick acrylic inserts for sound abatement from 2008 to 2011. But we decided to discontinue it because it disappointed too many of our customers who had mid-to-low frequency sound problems, i.e. big trucks, big motorcycles, big dogs, train rumble, a/c units, etc. Laminated glass inserts worked much better in all frequencies Now, we only use 1/4" acrylic in cases where the soundproof insert is required to bend.

A little history: When we first started producing soundproofing window inserts, we looked for four basic characteristics in choosing materials:

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