Bass (acoustic)

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The term bass (also called low frequency ) is used for frequencies from 16 to 150 Hz .

perception

This frequency range , represented approximately one-third of the human audible frequency spectrum and is therefore an essential part of human hearing.

Humans hear deep tones more heavily and quieter than other areas of the acoustic spectrum. A tone with 20.0 phon / dB at 1000 Hz has roughly the same volume perception for humans as a tone with 80 dB at 20 Hz.

Low frequencies are perceived not only through the ears, but with the whole body - deaf people can also perceive these vibrations and therefore dance to the beat. As early as the Middle Ages, the effect of the bass was used in the organ pieces in the church: There was something awe-inspiring deep basses, which is why they were only used in very specific places.

Pure sine tones lower than 120 Hz are more difficult to localize for the human ear . Tones lower than 80 Hz cannot be localized in their direction of origin at all, but their impulse or phase can . However, higher sound components of these bass tones are helpful for the directional localization. Therefore, the widespread assumption that the installation location of the sub-bass box doesn't really matter is completely wrong. A sub-bass must also play on the same time and pulse axis as the mid-range and tweeter speakers.

Deep tones can be captured over great distances. Whales , among others, make use of this fact in their communication, but the long-range sonar also works on the basis of the range of deep tones.

Individual evidence

  1. Tones with the same volume for humans

See also

Web links

  • Jürg Jecklin: hearing. (PDF) University of Music and Performing Arts Vienna, Institute for Electroacoustics, May 2003, archived from the original on September 20, 2009 ; accessed on June 18, 2016 (512 kB).