Abstract: Method for authenticating a timepiece including applying at least one external excitation to said timepiece using an external device, measuring acoustic vibrations at least one of emitted and absorbed inside the timepiece to obtain an electrical signal representative of the measured acoustic vibrations, wherein a magnitude of the electrical signal represents magnitude information of the measured acoustic vibrations as a function of time, comparing the magnitude information with at least one reference magnitude information, and determining an authenticity of the timepiece based on the comparing.

Abstract: Embodiments relate to method for authenticating timepiece comprising measuring acoustic vibrations emitted by timepiece to obtain electrical signal, which indicates variation of magnitude of measured acoustic vibrations as function of time. The method includes processing electrical signal to attenuate plurality of acoustic events in said electrical signal, performing transform of processed electrical signal into a frequency domain to obtain frequency-domain power spectrum indicating variation of power of processed electrical signal as a function of frequency, identifying at least one narrow peak in frequency-domain power spectrum corresponding to at least one resonance frequency of a part of timepiece resonating in a quiet zone.

Abstract: A method and apparatus for operating a gas turbine engine including determining a temperature of a working gas at a predetermined axial location within the engine. Acoustic signals are transmitted from a plurality of acoustic transmitters and are received at a plurality of acoustic receivers. Each acoustic signal defines a distinct line-of-sound path from one of the acoustic transmitters to an acoustic receiver corresponding to the line-of-sound path. A time-of-flight is determined for each of the signals traveling along the line-of-sound paths, and the time-of-flight for each of the signals is processed to determine a temperature in a region of the predetermined axial location.

Abstract: An apparatus and method for measuring the acoustical energy that will be applied to a substrate during cleaning. A substrate is provided that has placed upon it a piezoelectric member that is capable of sensing the acoustical power that is transmitted. This enables the detection and calibration of transducer assemblies that are used in the cleaning of substrates.

Abstract: The inventive circuitry on a semiconductor chip includes a first functional element having a first electronic functional-element parameter that exhibits a dependence relating to the mechanical stress present in the semiconductor circuit chip in accordance with a first functional-element stress influence function. The first functional element provides a first output signal based on the first electronic functional-element parameter and mechanical stress. A second functional element has a second electronic functional-element parameter that exhibits a dependence in relation to the mechanical stress present in the semiconductor circuit chip in accordance with a second functional-element stress influence function. The second functional element is configured to provide a second output signal based on the second electronic functional-element parameter and the mechanical stress.

Abstract: A semiconductor chip includes a first functional element having a first electronic functional-element parameter exhibiting a dependence relating to the mechanical stress present in the semiconductor circuit chip, and being configured to provide a first output signal, a second functional element having a second electronic functional-element parameter exhibiting a dependence in relation to the mechanical stress present in the semiconductor circuit chip, and being configured to provide a second output signal in dependence on the second electronic functional-element parameter and the mechanical stress, and a combination means for combining the first and second output signals to obtain a resulting output signal exhibiting a predefined dependence on the mechanical stress present in the semiconductor circuit chip, the first and second functional elements being integrated on the semiconductor circuit chip and arranged, geometrically, such that that the first and second functional-element stress influence functions ar

Abstract: A liquid-quantity monitoring apparatus includes: a piezoelectric device having a vibrating part capable of being exposed at least partly to a liquid-containing space, the piezoelectric device being capable of vibrating the vibrating part by a given drive signal and of generating a signal representing back electromotive force generated by vibration of the vibrating part; and a liquid-quantity determining unit for determining a quantity of liquid remaining in the liquid-containing space, to which the vibrating part is exposed, based on a resonance frequency of a residual vibration signal output from the piezoelectric device due to a residual vibration of the vibrating part after the vibrating part has been vibrated by the drive signal.

Abstract: A mechano/electrical sensor senses force or vibration and delivers at least one electrical signal that is a function of the sensed force or vibration. The sensor has at least one inner body supported by at least one piece of electric support structure that, in turn, is suspended in a surrounding framework. Signal leads are provided from opposite lead polarizable sides of the at least one support structure.