Abstract: A control method of sound producing, sound producing apparatus, and portable apparatus are provided. The control method of sound producing is for a portable device, including the following steps. (a) A first detected parameter indicating a detected excursion of a speaker of the portable device is generated. (b) A second audio signal is generated based on a first audio signal, wherein the second audio signal is generated selectively by compensation according to at least the first detected parameter. (c) A gain value is determined according to at least the first detected parameter and a third audio signal is generated based on the second audio signal according to the gain value.

Abstract: An ultrasonic distance-measuring sensor assembly and an ultrasonic distance-measuring sensor thereof are disclosed. The ultrasonic distance-measuring sensor includes at least two piezoelectric actuators and a member. The member includes a side wall, at least two vibration generating/receiving surfaces and a partition. The vibration generating/receiving surfaces accommodate the piezoelectric actuators as sources. The side wall surrounds the vibration generating/receiving surfaces. The partition is disposed between the vibration generating/receiving surfaces and includes a slot. The slot is disposed between the vibration sending/receiving surfaces.

Abstract: A substrate assembly including a first substrate, a second substrate, a sealant, and a blocking structure is provided. The first substrate has an active area. The sealant is disposed between the first substrate and the second substrate. The sealant assembles the first substrate and the second substrate and separates the first substrate and the second substrate in a cell gap to define a space, wherein the sealant has an injection opening. The blocking structure is disposed on the first substrate and located outside the active area. A distance from the blocking structure to the second substrate is smaller than the cell gap, wherein the blocking structure divides the space into a first area and a second area. The injection opening is merely located inside the first area and the active area is merely located inside the second area.

Abstract: A speaker system that includes an audio signal-receiving interface, a modulating circuit, a phase-control circuit, and a number of speaker units. The audio signal-receiving interface is configured to receive an audio signal, and the modulating circuit is coupled with the audio signal-receiving interface. The modulating circuit is configured to modulate a low frequency component of the audio signal and to generate a modulated signal. The phase-control circuit is coupled with the modulating circuit and the audio signal-receiving interface. The phase-control circuit is configured to receive the modulated signal and a high-frequency component of the audio signal and to control a phase of the modulated signal, a phase of the high-frequency component of the audio signal, or both. The speaker units are coupled with the phase-control circuit and configured to generate sound waves based on signals supplied by the phase-control circuit.

Abstract: An ultrasound transducer has a cup-shaped casing. The cup-shaped casing has a sidewall. A cross section of an inner surface of the sidewall being perpendicular to a central axis of the ultrasound transducer substantially shows a dumbbell-shaped contour. The dumbbell-shaped contour has a pair of opposite straight-line sections being substantially parallel to a longitudinal axis of the dumbbell-shaped contour and a pair of opposite arc sections being located respectively at two ends of the longitudinal axis of the dumbbell-shaped contour and respectively forming two enlarged portions of the dumbbell-shaped contour. Two ends of each arc section of the dumbbell-shaped contour respectively joint the straight-line sections through two curve sections and each curve section is connected to one end of the arc section and one straight-line section. At least one enlarged area of a dumbbell-shaped surface of an inside bottom surface has a recessed portion.

Abstract: An ultrasound transducer has a cup-shaped casing. The cup-shaped casing has a sidewall. A cross section of an inner surface of the sidewall being perpendicular to a central axis of the ultrasound transducer substantially shows a dumbbell-shaped contour. The dumbbell-shaped contour has a pair of opposite straight-line sections being substantially parallel to a longitudinal axis of the dumbbell-shaped contour and a pair of opposite arc sections being located respectively at two ends of the longitudinal axis of the dumbbell-shaped contour and respectively forming two enlarged portions of the dumbbell-shaped contour. Two ends of each arc section of the dumbbell-shaped contour respectively joint the straight-line sections through two curve sections and each curve section is connected to one end of the arc section and one straight-line section. At least one enlarged area of a dumbbell-shaped surface of an inside bottom surface has a recessed portion.

Abstract: A speaker system that includes an audio signal-receiving interface, a modulating circuit, a phase-control circuit, and a number of speaker units. The audio signal-receiving interface is configured to receive an audio signal, and the modulating circuit is coupled with the audio signal-receiving interface. The modulating circuit is configured to modulate a low frequency component of the audio signal and to generate a modulated signal. The phase-control circuit is coupled with the modulating circuit and the audio signal-receiving interface. The phase-control circuit is configured to receive the modulated signal and a high-frequency component of the audio signal and to control a phase of the modulated signal, a phase of the high-frequency component of the audio signal, or both. The speaker units are coupled with the phase-control circuit and configured to generate sound waves based on signals supplied by the phase-control circuit.

Abstract: An ultrasound transducer apparatus for shaping the ultrasound coverage field per application requirement in both the radiating and receiving mode of operation. Wave coverage field is shaped by forming at least one cut at designated location on the housing wall. A cut on the housing wall of the transducer pot-shaped structural body results into the reduction of wave intensity, either radiating or receiving, toward that direction where the cut is located.

Abstract: A passive thermoacoustic cooling apparatus for cooling of components such as miniaturized microelectronics is disclosed. The passive thermoacoustic cooling apparatus includes resonant cavities, a temperature-difference element and a heat conduction element. The temperature-difference element is integrated with the system of resonant cavities for conversion of heat into acoustic power. The heat conducting element connects a heat source to the temperature-difference element, which transmits heat from the source to one end of the temperature-difference component. Due to established temperature gradient across hot and cold ends of the temperature-difference element, acoustic standing wave arises in the resonant cavity system. Forced air convection is thereby generated to cool the heat source.

Abstract: A furnace residue washing method includes collecting residue from a furnace, cooling the residue by water and screening the residue by different dimension scales, separating the screened residue by different iron contents, separating and depositing sand from the cooling water, crushing the screened residue of large dimension scale, separating the screened residue of large dimension scale by different iron contents and recollecting separately the separated and screened residue of large dimension scale.