Over the last several decades low frequency and infrasound have become relevant to many fields of research-most recently psychology and musicology, among others. Interpretation of data from experimental research has raised concern that low frequency and infrasound could be potentially harmful to humans' well-being. While the physiological and psychological effects of infrasound are well documented, a variety of myths promulgated by pseudoscientific authors and newspapers still make it difficult to distinguish between fact and fiction, especially for people with little or no knowledge in acoustics. Myths are widespread today and result mainly from the one-dimensional view on sound, outof-context citations, and a number of "sensational" findings from biased studies. The aim of this review is to evaluate the relevance of data from a music-psychological and psychoacoustic point of view, to give a consistent overview of the history of research, to examine the transferability of findings, and to trace the origins of myths to debunk them. Additionally, general information about the characteristics of low frequency sound, its production, measurement, and difficulties in experimental research is given to avoid mistakes in future research.
annales musei nationalis slovaci zborník slovenského národného múzea bratislava 2022 a r c h e o l ó g i a 3 2 ročník cxvi zborník slovenského národného múzea annales musei nationalis slovaci
Pellet bells forged from metal sheets were common during the Avar period. Their investigation is part of the research project "Metallic Idiophones between 800 BC and 800 AD in Central Europe". A large amount of the pellet bells were forged from sheet iron, and the rest from copper and various copper alloy sheets. To find out the reason why sheet iron was preferred, different materials were used in forging experiments. While sheet copper and bronze were quite easily shaped, sheet iron needed much more force to be shaped into the swage block. Listening to the sounds of the three comparably-shaped pellet bells, they differ substantially in timbre and loudness. The analyses of the sound recordings showed no significant correlations between any of the calculated psychoacoustic parameters. The copper bell showed the lowest values, the bronze bell the middle and the iron bell the highest values. A possible explanation for the use of iron pellet bells could be found in magical-religious imagination and psychological warfare.
This commentary discusses and comments on the study by Trevor and Huron on the acoustical similarities between human laughter and staccato articulation in music.
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