5
2 TECHNOLOGY
Unlike a conventional direct radiating super tweeter, the Fyne Audio patent pending
SuperTrax™,radiatesenergythrough360degreesbringsfurtherimportantbenetsin
performance, while using a new type of thin ply carbon diaphragm (TPCD).
HUMAN PERCEPTION OF ULTRASOUND
Looking at the frequency range of musical instruments and human hearing, the
accepted range is taken as extending from 15 to 20kHz including the harmonics
of instruments. It is these harmonics that give instruments their character (Fig.
1). However more recent research has shown there is considerable energy above
20kHz, with most instruments showing energy above 40kHz. Even sibilants in
speech were found to have energy above 40kHz. It is the pitchless instruments,
such as members of the percussion family that generate the greatest amount of
ultrasound. A cymbal crash has been measured as having 40% of its energy above
20kHz, while a triangle was found to have a healthy output at 100kHz. Research
has shown we are able to perceive this energy, concluding the mechanism was
through bone conduction, probably to a small organ in the inner ear called the
saccule, that perceives acceleration and gravity, which is effectively linked to the
cochlea, the organ responsible for hearing as we know it.
HARP
VIOLIN
VIOLA
CELLO
BASS
SOP
CONT
TEN
BAR
BASS
PICALLO
FLUTE
OBOE
COR ANGLAIS
BASS CLARINET
BASSOON
CONTRA-BASSON
TENOR - TROMBONE
TRUMPET
FRENCH-HORN
BASS-TROMBONE
TUBA
TRIANGLE
CYMBALS
SNARE DRUM
TIMPANI
BASS DRUM
ORGAN
PERCUSSION
BRASS
WOODWIND
VOICES
STRINGS
Bflat CLARINET
27.5 55 110 220 440 880 1760 3520
15 20 30 50 70 100 200 300 500 700 1K 2K 3K 5K 7K 10K 15K
FREQUENCY (Hz)
FUNDAMENTAL RANGE OVERTONES PITCHLESS INSTRUMENTS
1
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