Chimpanzees live in fission‐fusion social organizations, which means that party size,
composition, and spatial distribution are constantly in flux. Moreover, chimpanzees use a …

Sape is a popular traditional musical instrument from Sarawak, Malaysia. This instrument is
handmade and differs in wood, dimension, design, etc. This impedes the preservation and …

Key message The specific dynamic elastic modulus, acoustic radiation, logarithmic
decrement, sound transmission parameter, and acoustic conversion efficiency of spruce …

Wood is the main material used for musical instrument soundboard fabrication, for practical
and cultural reasons. As a natural material, however, wood is easily degraded due to …

Despite the progress in synthetic polymer industries, wood is one of the main materials in
making musical instruments because of its unique characteristics. Many instrument makers …

Inhomogeneities in wood and wood products are evident. Sometimes these
inhomogeneities are combined with other inhomogeneities such as drilling. Each can have …

Wood is a main material in the construction of musical instruments and speaker boxes,
especially in developed countries. This study investigated the changes in acoustic …

The Young's modulus in the longitudinal direction of a Sitka spruce specimen was
determined by conducting free-free flexural vibration tests based on Euler–Bernoulli's and …

Passive localization and tracking of a mobile emitter, and the joint learning of its reverberant
3D environment, are important yet challenging tasks in the shallow-water underwater …

Western chimpanzee (Pan troglodytes verus) populations are estimated to have decreased
by more than 80% from 1990 to 2014. Previously, all four recognized subspecies of …