Those who are told that any bandwidth (even 2.4kHz) can qualify as " ESSB" if EQ'ed properly, are being misled and likely to think that if they hear a signal that occupies 4, 5 or 6kHz of bandwidth, that something is wrong! I don't want to make excuses for ESSB, or the bandwidth it requires, but rather just define it and enjoy the fidelity that the " Extended SSB" bandwidth supports. The term "Enhanced" is a descriptive adjective that could mean just about anything, like "Smooth", "Pleasing", "DX Audio", etc. The main reasons I am concerned about how ESSB is defined are: Maybe we should look into coining yet another phrase like Art Bell mentioned as: "BSSB" or "Better Single SideBand". While " Extended Single SideBand" is certainly an " Enhanced" form of SSB, " Enhanced SSB" is not necessarily " Extended" in bandwidth and fidelity! So, perhaps " Enhanced SSB" is a valid term for EQing the crap out of a 2.4 kHz signal, but it is NOT the " ESSB" that I established and defined. the intended " Extended" version I designed as stated below from my website definition originally authored in January 2003: I normally wouldn't say anything about it, but I have a couple of concerns regarding the " Enhanced" viewpoint, vs. The term " ESSB" is being misinterpreted by many. The " E" in " ESSB" Stands For " Extended" not " Enhanced" or " Expanded"! See the excellent Polycom White paper on: " The Effects of Bandwidth vs. The accurate reproduction of these sounds are essential for high definition speech with less listener fatigue. Even though vocal chord energy diminishes rapidly above 3 kHz, the all important high frequency consonants of human speech such as the "S", "T", "SH", "CH" "K" and "Z" sounds that are formed with various combinations of the tongue, roof of the mouth and teeth are well above 3 kHz. The reason for this, is that high frequency audio from 3 kHz and above starts to support a significant difference in clarity, "openness" and fidelity of the audio signal that better reproduces natural energy found in the human voice. In the scheme above, 3 kHz of audio bandwidth was the chosen criteria or threshold qualifying a signal as ESSB.
#Essb audio full#
Note: I consider "Extended SSB" to be any J3E SSB mode that exceeds the audio bandwidth of standard or traditional 2.9kHz J3E modes (ITU 2K90J3E) in order to support the fidelity required and desired for relative High Fidelity, full range clean and articulate vocal audio.
However, speaking in a relative fashion as compared to standard SSB practice, I would like to define the terms we use as follows in the table below as a relative reference only: By this definition, any Amateur Radio transmission (SSB or AM) hardly qualifies as absolute true Hi-fi. 20Hz ~ 20kHz of flat frequency response with very low Total Harmonic distortion (THD) and good Signal-To-Noise (S/N) characteristics. These terms can be somewhat confusing since true "Hi-fi" is an old stereophonic audio term referring to true High-fidelity audio - e.g. Source: - What Is ESSB Hi-Fi SSB Audio - ESSB Extended J3E Audio Bandwidth DefinedĮSSB Hi Fi sounds ominous. What is Lo-Fi - Mid-Fi - Hi-Fi and Extended SSB ( ESSB ) ?