In detecting insect infestations in bulk‐stored grain using an array of acoustic sensors, it is important to know the range of sound transmission in grain. Preliminary tests [R. Hickling and W. Wei, Appl. Acoust. 44 (1995)] have shown that grain can be highly absorbing, depending on ...
Phonak Lyric extended-wear hearing aids). Some hearing aid wearers, like those with severe hearing loss, may express a preference for the more "linear" sound of analog devices, particularly if they previously
aThe primary topic to address in the field of acoustic design in cities is noise.The handbook for Acoustic Ecology defines noise as \"unwanted sounds\".Schafer proposed four different types of definitions that are subjective and objective:1)unwanted sound 2)unmusical sound (defined as non-periodi...
These include a Calibre 8 sound gun, a start gun, a Calibre 16 hunting gun, and a toy gun. The latter was included both because of its short pulse duration and for comparison purposes. Correct selection of a source is very important because it largely determines the results of acoustic ...
The sound creation system moves air particles using two different type electromagnets. One electromagnet is variably modulated by an electrical audio signal using spectral sound decomposition. The variable electromagnetic field is conjugated with a constant electromagnetic barrier moving the air particles....
We show that the distribution of high frequency sound field tends to equilibrium with the other acoustic mode. We also derive the effective kinetic equation which governs the low frequency sound field. Yet, we consider the formation of distribution. We find that the stationary state is reached ...
Profile types of sound speed in the lower atmosphere and their relationships to acoustic focusingACOUSTIC VELOCITYFOCUSINGLOWER ATMOSPHERESEASONSACOUSTICSLOWER ATMOSPHERESOUND VELOCITYProfile types of sound speed in lower atmosphere and relations to acoustic focusing...
Acoustic metamaterials (AMs) bring a new sight for low frequency noise control because they can control low frequency wave with subwavelength structures. Since plate type structures are widely used in engineering, the plate type AM structures with different types of resonators are studied by both ...
The main aim of this paper is to test various types of earplugs used by sound engineers. At live events, when sound engineers need to use earplugs for health reasons, it is very important that they maintain correct hearing perception abilities. The linear frequency response allows to avoid ...
The main aim of this paper is to test various types of earplugs used by sound engineers. At live events, when sound engineers need to use earplugs for health reasons, it is very important that they maintain correct hearing perception abilities. The linear frequency response allows to avoid ...