Skip to main content
Please consider registering
Forum Scope


Forum Options

Minimum search word length is 3 characters - maximum search word length is 84 characters
Register Lost password?
sp_Feed sp_TopicIcon
Reducing one particular frequentie
Forum Posts: 3
Member Since:
June 20, 2016
sp_UserOfflineSmall Offline
November 29, 2021 - 8:01 am
sp_Permalink sp_Print

Hi Mr Foley,

I’ve experimented a lot in my attic to see where my nearfield monitor speakers are least clouded by the room modes.

I used an SPL meter and an RTA to check my sine wave generator at about 83 dB.

While the frequencies varied between ±6 and 8 dB in most places,
there was one particular frequency that was annoyingly consistent no matter where I positioned or placed the speakers “142.2 Hz ±19 dB”.
The softest tone I measured was 50 Hz and the loudest 142.2.

Got two panels of (cm) H180 W100 D9 full, I know you hate that stuff, Rockwool.
But the thing is, they helped me reduce the peak by 3dB.

It’s the best I can get with my limited knowledge, but I’ve also learned that when I’m recording vocals or guitars, especially acoustic guitars, they can sometimes benefit from a cut at 142.2 Hz.

Anyway, if I wanted to lower that specific frequency of 142.2 Hz in a concrete floor attic measuring (cm) D509 W544 H265, how would I do it?

Chief Acoustics Engineer
Forum Posts: 629
Member Since:
August 12, 2013
sp_UserOfflineSmall Offline
November 30, 2021 - 6:59 am
sp_Permalink sp_Print

You need to manage all frequencies that are over + – 2 dB. Going after a single frequency with that many spatial irregularities is not advisable.

Forum Posts: 3
Member Since:
June 20, 2016
sp_UserOfflineSmall Offline
December 1, 2021 - 4:50 am
sp_Permalink sp_Print


Thanks for your time anyway…

Forum Timezone: America/Los_Angeles
Most Users Ever Online: 158
Currently Online:
Guest(s) 2
Currently Browsing this Page:
1 Guest(s)
Forum Stats:
Groups: 4
Forums: 10
Topics: 610
Posts: 1647


Member Stats:
Guest Posters: 31
Members: 18709
Moderators: 0
Admins: 2
Administrators: admin, Dennis Foley