Klark Teknik DN360 manual Effects of Equalisation on Voice Reproduction

Table 1: Effects of Equalisation on Voice Reproduction

1/3 Octave centre frequency (Hz)	Effect on voice
40, 50, 63, 80,100,125,	Sense of power in some outstanding
	bass singers.
160, 200, 250,	Voice fundamentals.
315, 400, 500	Important for voice quality.
630, 800, 1k	Important for voice naturalness. Too
	much boost in the 315 to 1k range
	produces a telephone like quality.
1.25 to 4k	Vocal fricatives - accentuation of vocals.
	Important to speech intelligibility. Too
	much boost between 2 and 4kHz can
	mask certain speech sounds e.g “m”, “b”
	and “v” can become indistinguishable.
	Too much boost anywhere between 1 and
	4kHz can produce “listening fatigue”.
	Vocals can be highlighted by slightly
	boosting the vocal at 3kHz and at the
	same time slightly dipping the instruments
	at the same frequency.
	Accentuation of voice.
5, 6.3, 8k	The range from 1.25 to 8k governs the
	clarity of voice.
10,12.5, 16k	Too much boost causes sibilance.

Table 2: Effects of Equalisation on Music Reproduction

1/3 Octave centre frequency (Hz)	Effect on music
31,40, 50, 63	Fundamentals of bass drum, tuba, double
	bass and organ. These frequencies give
	music a sense of power. If over-
	emphasised they make the music “muddy”.
	50 or 60Hz band also used to reject ac.
	Mains hum.
80, 100, 125	Fundamentals of lower tympani. Too much
	boost produces excessive “boom”. 100 or
	125Hz also used for hum rejection.
160, 200, 250	Drum and lower bass. Too much boost
	produces excessive “boom”. Also useful
	for 3rd harmonic mains hum rejection.
315, 400, 500	Fundamentals of string and percussion.
630, 800, 1k	Fundamentals and harmonics of strings,
	keyboards and percussion.
	Boosting the 600 - 1kHz range can make
	instruments sound horn like.
1.25 to 4k	Drums, guitar accentuation of vocals,
	strings and brass.
	Too much bass in the 1 to 2kHz range can
	make instruments sound tinny. Too much
	boost anywhere between 1 to 4kHz can
	produce “listening fatigue”.
5,6.3, 8k	Accentuation of percussion, cymbals and
	snare drum.
	Reduction at 5kHz makes overall sound
	more distant and transparent.
	Reduction of tape hiss and system noise.
	The 1,25 to 8k governs clarity and
	definition.
10, 12.5, 16k
	Cymbals and overall brightness. Too much
	boost causes sibilance.
	Reduction of tape hiss and system noise.

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