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The report "A Review of Published Research on Low Frequency Noise and its Effects" [54] contains a long list of research about exposure to high-level infrasound among humans and animals. For instance, in 1972, Borredon exposed 42 young men to tones at 7.5 Hz at 130 dB for 50 minutes.
Most rooms have their fundamental resonances in the 20 Hz to 200 Hz region, each frequency being related to one or more of the room's dimensions or a divisor thereof. These resonances affect the low-frequency low-mid-frequency response of a sound system in the room and are one of the biggest obstacles to accurate sound reproduction.
The Journal of Research in Music Education publishes reports of original research related to music teaching and learning. The journal covers topics such as music pedagogy, history, and philosophy, and addresses vocal, instrumental, and general music at all levels, from early childhood through to adult.
Establishing journal eminence in music education research. Journal of Research in Music Education, 46, 405-413. doi:10.2307/3345552. Hancock, C. B. (2015). Stratification of Time to First Citation for Articles Published in the Journal of Research in Music Education A Bibliometric Analysis. Journal of Research in Music Education, 63, 238-256.
The examples include ground vibrations produced by elephants whose principal frequency component is around 15 Hz, and low- to medium-frequency substrate-borne vibrations used by most insect orders. [15] Many animal sounds, however, do fall within the frequency range detectable by a human ear, between 20 and 20,000 Hz. [16]
The measure of the low frequency (many tens of Hz) noise contributed by the turntable of an analogue playback system. It is caused by imperfect bearings, uneven motor windings, vibrations in driving bands in some turntables, room vibrations (e.g., from traffic) that is transmitted by the turntable mounting and so to the phono cartridge.
An example is a common sound amplification system with a microphone, amplifier and speaker. When the microphone is in front of the speaker, we hear an annoying whistle. This whistle is generated without extra contribution from the sound source, and is self-reinforced and self-sufficient while the microphone is somewhere in front of the speaker.
Room acoustics is a subfield of acoustics dealing with the behaviour of sound in enclosed or partially-enclosed spaces. The architectural details of a room influences the behaviour of sound waves within it, with the effects varying by frequency.