The pulse broadening and decay of coherent sound waves propagating in disordered granular media are investigated. We find that the pulse width of these compressional waves is broadened when the disorder is increased by mixing the beads made of different materials. To identify the responsible mechanism for the pulse broadening, we also perform the acoustic attenuation measurement by spectral ana...

Analogies are often theoretically useful. Important principles of electricity are suggested by an analogy between water flowing through a pipe and electricity “flowing” through a wire, with voltage corresponding to pressure, amperage corresponding to the current, and so on. A basic theory of sound is suggested by an analogy between waves caused by a stone being dropped into a still lake and “so...

The classic texts of Indian origin record the influence of Mantras on plants and animals. Ayurveda also recognises the importance of this realm of medicine. The author during his various experiments on plants found that these from the stage of seedling to the maturity are effected by certain types of sound waves, especially the Mantras. This study reveals that the plants have shown a positive r...

Ultrasonic vocalizations (USVs) are essential communicative sounds used between rodent pups and their mother. Rat pups emit USVs in stressful situations, such as when they are cold or separated from the nest. We verified the ontogenetic changes in USVs emitted by infant rats isolated from their mother during the pre-weaning period. The number of calls, and the median frequency and first peak of...

The development of the obstetric ultrasound [6] has allowed physicians and embryologists to obtain a clear picture of the developing human embryo and fetus [7] during pregnancy [8]. Obstetric ultrasonography, often referred to as ultrasound [6], is a technology that uses sound waves to produce images of structures inside the human body. A handheld probe emits sound waves, which are reflected ba...

The development of the obstetric ultrasound [6] has allowed physicians and embryologists to obtain a clear picture of the developing human embryo and fetus [7] during pregnancy [8]. Obstetric ultrasonography, often referred to as ultrasound [6], is a technology that uses sound waves to produce images of structures inside the human body. A handheld probe emits sound waves, which are reflected ba...

The development of the obstetric ultrasound [6] has allowed physicians and embryologists to obtain a clear picture of the developing human embryo and fetus [7] during pregnancy [8]. Obstetric ultrasonography, often referred to as ultrasound [6], is a technology that uses sound waves to produce images of structures inside the human body. A handheld probe emits sound waves, which are reflected ba...

The development of the obstetric ultrasound [6] has allowed physicians and embryologists to obtain a clear picture of the developing human embryo and fetus [7] during pregnancy [8]. Obstetric ultrasonography, often referred to as ultrasound [6], is a technology that uses sound waves to produce images of structures inside the human body. A handheld probe emits sound waves, which are reflected ba...

A mixed media tool was created that promotes ensemble virtuosity through tight coordination and interdepence in musical performance. Two different types of performers interact with a virtual space using Wii remote and tangible interfaces using the reacTIVision toolkit [11]. One group of performers uses a tangible tabletop interface to place and move sound objects in a virtual environment. The s...

There are studies indicate that audible sound wave could have effects on propagation growth through catalyzing hearing sense organs, which would bring a series of physiological and biological chemistry reaction. The soundpressure level and frequency are important factors in propagation growth. In this study, an experimental system of audio generator was developed for investigating sound wave ef...