42 lines
2.0 KiB
Markdown
42 lines
2.0 KiB
Markdown
Title: Theatre Acoustic Panels
|
|
Date: 2021-10-21
|
|
Category: Creations
|
|
Summary: Panels for acoustic treatment in my home theatre.
|
|
Short: 3
|
|
|
|
Acoustic treatment is one of the most overlooked aspects of home audio. There's
|
|
no point in spending money on premium speakers if the room they are playing in
|
|
has poor acoustics.
|
|
|
|
The primary purpose of acoustic panels is to reduce the reverberations caused by
|
|
sound reflecting off the smooth walls of the theatre. The path of the reflected
|
|
sound is a longer distance to your ear compared to the sound coming directly
|
|
from the speaker. This causes the reflected sound to be delayed by the time it
|
|
reaches your ear. The delayed signal interferes with itself, causing comb
|
|
filtering which distorts the signal.
|
|
|
|
Acoustic panels are placed geometrically where the sound from the speakers would
|
|
reflect off the wall to reach the listener's ears. The insulation inside the
|
|
panels absorbs energy from the soundwave which reduces its volume and
|
|
interference.
|
|
|
|
|
|
|
|
I made six frames in the wood shop of my local makerspace, Protospace. After
|
|
cutting the 1x4" pine boards to length, I made a jig so I could quickly join
|
|
them together with screws.
|
|
|
|
|
|
|
|
I added 4" batts of Rockwool insulation into each frame after it was assembled.
|
|
I then wrapped the frame with black speaker fabric and stabled it in place while
|
|
trying to pull it taut.
|
|
|
|
I sat in my theatre while a friend slid a handheld mirror along the wall until I
|
|
could see the middle of the speaker in its reflection. This told me the centre
|
|
point of where to mount each panel because the reflected sound would take the
|
|
same path to my ear.
|
|
|
|
<span class="aside">Four in the front, two in the back</span>
|
|
|