Sub-bass

Sub-bass sounds are the deep, low-register pitches below approximately 70 Hz^[1] (C♯₂ in scientific pitch notation) and extending downward to include the lowest frequency humans can hear, approximately 20 Hz (E₀).

In this range, human hearing is less sensitive, so these notes tend to be felt more than heard.^[2] The low E-string on a bass guitar is usually tuned to 41.2 Hz, while the lowest note on a standard piano is A at 27.5 Hz. Sound reinforcement systems and PA systems often use one or more subwoofer loudspeakers to amplify sounds in the sub-bass range. Sounds below sub-bass are infrasound.

^ Fink, Robert (2018). "Below 100 Hz: Toward a Musicology of Bass Culture". In Latour, Melinda; Fink, Robert; Wallmark, Zachary (eds.). The Relentless Pursuit of Tone: Timbre in Popular Music. Oxford University Press. pp. 92–93. ISBN 978-0199985258. Many sound engineers start talking about "sub-bass" around 70 Hz, [...]; at the bottom of the sub-bass register, around 30 Hz
^ "Interactive Frequency Chart". Independent Recording Network. Archived from the original on 24 March 2013. Retrieved March 9, 2012.{{cite web}}: CS1 maint: unfit URL (link)

[defn-tone-1] Fink, Robert (2018). "Below 100 Hz: Toward a Musicology of Bass Culture". In Latour, Melinda; Fink, Robert; Wallmark, Zachary (eds.). The Relentless Pursuit of Tone: Timbre in Popular Music. Oxford University Press. pp. 92–93. ISBN 978-0199985258. Many sound engineers start talking about "sub-bass" around 70 Hz, [...]; at the bottom of the sub-bass register, around 30 Hz

[2] "Interactive Frequency Chart". Independent Recording Network. Archived from the original on 24 March 2013. Retrieved March 9, 2012.{{cite web}}: CS1 maint: unfit URL (link)

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