in this study, the disadvantages of wood, which is widely employed in producing music instruments, are discussed. for example, high moisture sensitivity, low impact resistance, and time-consuming procedure as well as various properties of different species or in several parts of one specimen which are the main problems of wooden music instruments are extensively discussed in this paper. many ma...

in recent years, demand for biological sensors which are capable of fast and accurate detection of minor amounts of pathogens inreal‑time form has been intensified. acoustic wave (aw) devices whose performance is determined by mass sensitivity parametersand quality factor are used in biological sensors as platforms with high quality. yet, current aw devices are facing many challengessuch as the...

SUMMARY Because of the aperiodicity of many tracheoesophageal voices, acoustic analysis of the tracheoesophageal voice is less straightforward than that of the normal voice. This study presents the development and testing of an acoustic signal typing system based on visual inspection of a narrow-band spectrogram that can be used by researchers for classification of voice quality in tracheoesoph...

the course of consecutive experiments in this report aimed to a research or introductory identification about mechanical and acoustical properties of maple (acer velutinum) wood. studied factors were included quality factor (due to internal friction), acoustic coefficient, acoustical conversion efficiency as well as the modulus of elasticity (young’s modulus) which they were all accomplished us...

MATERIALS REFERENCE ISSUE Ability to both feel and hear the results of engineering decisions via a “virtual car” – simultaneous engineering – can significantly shorten vehicle development time. Sound quality and discrete vibration at the driver’s position may be predicted and ‘driven’ before the first prototype is built. Although sound quality cannot yet be predicted in an unknown chassis, the ...

An embedded acoustic instrument is an embedded musical instrument that provides a direct acoustic output. This paper describes how to make embedded acoustic instruments using laser cutting for digital fabrication. Several tips are given for improving the acoustic quality including: employing maximally stiff material, placing loudspeaker drivers in the corners of enclosure faces, increasing the ...

worship places are psychologically evolved in human’s mind, because his unconscious mind manifests evolution differently in such places. every religion has its concerning style, while islam and christianity represent two different blazes in two separate places. church and mosque are very important worship places and designers try to create a spiritual sense of place for the audience. whereas ac...