Disclosed herein a method of producing an ultrasound that includes defining a set of criteria for an ultrasound emitter comprising a plate. The set of criteria includes a power output criterion, a frequency criterion and number of nodes for a resonance mode of the plate, a focus criterion, and a durability criterion. The method includes determining an outline and a thickness range for the plate, based on the set of criteria. The method includes using topology optimization to determine internodal zone dimensions for the plate, based on the set of criteria, the outline, and the thickness range. The method includes manufacturing the plate according to the internodal zone dimensions.

Disclosed herein a method of producing an ultrasound that includes defining a set of criteria for an ultrasound emitter comprising a plate. The set of criteria includes a power output criterion, a frequency criterion and number of nodes for a resonance mode of the plate, a focus criterion, and a durability criterion. The method includes determining an outline and a thickness range for the plate, based on the set of criteria. The method includes using topology optimization to determine internodal zone dimensions for the plate, based on the set of criteria, the outline, and the thickness range. The method includes manufacturing the plate according to the internodal zone dimensions.

The invention relates to a stethoscope comprising a stethoscope chestpiece comprising a body member having a bottom surface and an ejector mark disposed on the bottom surface. The stethoscope chestpiece has a weight of at least 50 g, a surface roughness (Ra) no greater than 1.6 microns in an unpolished state, and reflectivity (% R) of at least 60% in an unpolished state. The stethoscope chestpiece can be produced by injection molding, extruding, or pressing a metallic thermoplastic composition into a mould forming a green molded body, debinding a portion of binder material from green molded body forming a brown molded body without reducing the temperature by more than 80 C., and sintering the brown molded body to form the stethoscope chestpiece.

The invention relates to a stethoscope comprising a stethoscope chestpiece comprising a body member having a bottom surface and an ejector mark disposed on the bottom surface. The stethoscope chestpiece has a weight of at least 50 g, a surface roughness (Ra) no greater than 1.6 microns in an unpolished state, and reflectivity (% R) of at least 60% in an unpolished state. The stethoscope chestpiece can be produced by injection molding, extruding, or pressing a metallic thermoplastic composition into a mould forming a green molded body, debinding a portion of binder material from green molded body forming a brown molded body without reducing the temperature by more than 80 C., and sintering the brown molded body to form the stethoscope chestpiece.

An elastic sound generating device, comprising an elastic sounding body integrally formed of an elastic material, the elastic sounding body having therein one or more sound amplified holes which can be pressed to adhere and then released to generate vibration and sound, and the sound amplified hole is opened through an outer surface of the elastic sounding body. The elastic sounding body is pressed and deformed until inner walls of the sound amplified hole adhere to each other, and then the elastic sounding body is released to restore the original shape and separate the inners wall of the sound amplified hole, and when the inner walls of the sound amplified hole are separated from each other, a sound is generated. The generated sound as a detectable signal is a solution for the range of motion of the training joint, the strength of the output and the shortest duration.

An elastic sound generating device, comprising an elastic sounding body integrally formed of an elastic material, the elastic sounding body having therein one or more sound amplified holes which can be pressed to adhere and then released to generate vibration and sound, and the sound amplified hole is opened through an outer surface of the elastic sounding body. The elastic sounding body is pressed and deformed until inner walls of the sound amplified hole adhere to each other, and then the elastic sounding body is released to restore the original shape and separate the inners wall of the sound amplified hole, and when the inner walls of the sound amplified hole are separated from each other, a sound is generated. The generated sound as a detectable signal is a solution for the range of motion of the training joint, the strength of the output and the shortest duration.

Disclosed are a vibrating diaphragm for a sound generating device, a method for preparing the vibrating diaphragm, and a sound generating device. The vibrating diaphragm comprises at least one modified thermoplastic polyester elastomer layer, wherein a modifier is involved which is at least one of a temperature: resistant resin, an inorganic filler and an anti-aging agent, and the modifier is added to a themoplastic polyester elastomer material. In an embodiment of the present invention, by adding the modifier to the themoplastic polyester elastomer material and sufficiently mixing the modifier when making a film layer, the aim of improving the temperature resistance of a moulded vibrating diaphragm is achieved.

A glass sheet composite includes a first glass sheet; a second glass sheet; and a liquid layer sandwiched between the first glass sheet and the second glass sheet. The glass sheet composite has a loss coefficient greater than or equal to 110.sup.2 at 25 C., and an acoustic velocity of longitudinal wave greater than or equal to 5.010.sup.3 m/s in a sheet thickness direction at 25 C. The liquid layer has a viscous coefficient of 110.sup.4-110.sup.3 Pa.Math.s at 25 C., and a surface tension of 15-80 mN/m at 25 C. The liquid layer contains particles whose mean particle diameter is 0.3-1 m.

A glass sheet composite includes a first glass sheet; a second glass sheet; and a liquid layer sandwiched between the first glass sheet and the second glass sheet. The glass sheet composite has a loss coefficient greater than or equal to 110.sup.2 at 25 C., and an acoustic velocity of longitudinal wave greater than or equal to 5.010.sup.3 m/s in a sheet thickness direction at 25 C. The liquid layer has a viscous coefficient of 110.sup.4-110.sup.3 Pa.Math.s at 25 C., and a surface tension of 15-80 mN/m at 25 C. The liquid layer contains particles whose mean particle diameter is 0.3-1 m.

An ultrasonic device includes a base material that has an opening, a vibration plate that is provided on the base material and closes the opening, and a piezoelectric element that is provided on the vibration plate, in which the vibration plate has a first layer provided on the base material, and a second layer that is disposed between the first layer and the piezoelectric element and that suppresses diffusion of a component contained in the piezoelectric element, and a bending rigidity of the second layer is equal to or larger than a bending rigidity of the first layer.