Why tone controls have 1kHz center freq ?

Sebba · 21st February 2008, 04:13 PM

I most bass/treble and also loudness controls frequences from 1kHz up and down are boosted or attenuated.
1kHz is neiter the center frequency nor the maximum sensitivity of human hearing (3kHz) In music, the "middle midle tone is 440Hz so why 1kHz ?
Here's a typical tone control with freq. response http://focus.ti.com/lit/an/sloa042/sloa042.pdf

JRace · 21st February 2008, 04:20 PM

Perhaps it is due to the fact that 1kHz is the easiest pure tone to heare, as well as the easiest tone to detect distortion or tonal changes.

At least that is why we ini the hearing tesing industry always start with 1kHz.

PeteMcK · 21st February 2008, 09:47 PM

Rod E likes to move the turnover points away from 1Khz:

http://sound.westhost.com/dwopa2.htm

21st February 2008, 04:13 PM	#1
Sebba diyAudio Member Join Date: Jan 2005 Location: Glucholazy, Poland	Why tone controls have 1kHz center freq ? I most bass/treble and also loudness controls frequences from 1kHz up and down are boosted or attenuated. 1kHz is neiter the center frequency nor the maximum sensitivity of human hearing (3kHz) In music, the "middle midle tone is 440Hz so why 1kHz ? Here's a typical tone control with freq. response http://focus.ti.com/lit/an/sloa042/sloa042.pdf __________________ Sebba

21st February 2008, 09:47 PM	#3
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	unimaginative designers... Rod E likes to move the turnover points away from 1Khz: http://sound.westhost.com/dwopa2.htm __________________ “In the beginner's mind there are many possibilities, but in the expert's mind there are few” Shunryu Suzuki

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21st February 2008, 04:20 PM	#2
JRace diyAudio Member Join Date: Jan 2006 Location: Vernon, BC	Perhaps it is due to the fact that 1kHz is the easiest pure tone to heare, as well as the easiest tone to detect distortion or tonal changes. At least that is why we ini the hearing tesing industry always start with 1kHz.

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