acoustology_903 3 | Biblioteca audio auralex

below 75 Hz? So glad you asked :

Specific low frequency devices and wha they can (and cannot) do.

room:

Next month:

Axial

Tangential

Concepts (Syn-Aud-Con -- www.synaudcon.com), actually measured LENRDs in action and found pretty much what

Type

And next month we will look at the pros and cons of each of these solutions in detail!

f (Hz)

70.6

From the right-hand table on the previous page, there are three main frequencies we need to be concerned with

Axial

1. Roll-off ("EQ out") the low-end.

[I know I promised you more this month, but alas -- I have run out of space (and time). So stay tuned!!!]

2. Use "Helmholtz resonators."

56.5

in this range for our example, which I've reproduced here with a little more detail about their behavior in the

There are a four different ways we can look at treating these lower frequency problems:

73.5

we have known to be true all along: LENRDs can control down to about 75 to 100 Hz. (A reprint of Pat's review

OK, so what about the problematic frequencies

3. Use "diaphragmatic" absorbers.

works a lot lower than you would think. Not convinced? Pat Brown, the chief audio guru at Synergetic Audio

4. Use broadband absorbers.