Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7319770 | Method of processing an acoustic signal, and a hearing instrument A method of processing an acoustic input signal into an output signal in a hearing instrument includes converting the acoustic input signal into a converted input signal, and applying a gain to the converted input signal to obtain the output signal. According to the... | 01/15/2008 |
| 7249511 | Method of detecting resonant frequency, method of selecting resonance frequency, and device for detecting resonant frequency sensor A device for detecting a resonant frequency comprises a sound source, a switch, a mixer, and a sound meter. The switch and mixer are capable of switching between a first state in which the switch and mixer output a measurement signal and a second state in which the ... | 07/31/2007 |
| 7171004 | Room acoustics echo meter for voice terminals The present invention provides an indication to the user of a voice communication system that an echo at the user's location has been detected by the system. In response to receiving this indication of echo, users may take any of several actions to reduce the echo, ... | 01/30/2007 |
| 7143649 | Sound characteristic measuring device, automatic sound field correcting device, sound characteristic measuring method and automatic sound field correcting method In order to measure a sound characteristic in a sound space, measurement sound is outputted to the sound space. Measurement sound data of a predetermined time period, which is prepared in advance, is divided into plural block periods, and plural block sound data are... | 12/05/2006 |
| 7036361 | Method and device for checking the air noise of a motor vehicle A method is used for checking the air noise of a motor vehicle, particularly of a passenger car, which air noise is generated by air flowing onto an outer skin of a vehicle body of the passenger car. In order to optimize this method, targeted air currents are applie... | 05/02/2006 |
| 7004031 | Ultrasonic sensor An ultrasonic sensor includes a piezoelectric vibrator, a reverberation measuring device and a compensating device. The piezoelectric vibrator vibrates to transmit an ultrasonic wave, receives a reflected wave of the transmitted ultrasonic wave and produces an outpu... | 02/28/2006 |
| 6655212 | Sound field measuring apparatus and method A sound field measuring apparatus has: an exponential pulse generator 11 which outputs a pulse signal to speakers 4a, 4b, . . . ; a microphone 6 which is disposed in an acoustic space 5 where the speakers 4a, 4b, . . . are disposed, and which detects a pu... | 12/02/2003 |
| 6431001 | Obstacle detecting system having snow detecting function An obstacle detecting system for vehicles has an ultrasonic vibrator having a vibration plate and mounted on a vehicle to transmit and receive an ultrasonic wave. An obstacle is detected in response to an output signal of the ultrasonic vibrator. When the... | 08/13/2002 |
| 5227982 | Digital reverberation time measurement system Apparatus and method, having both structural and acoustical applicability, for measuring damping of a solid or fluid resonant physical system in terms of reverberation or decay time, featuring a digital computer-based measurement system in which plural nu... | 07/13/1993 |
| 4688429 | Determination of the spectral content of transient stress wave events The spectral content of a transient stress wave event occuring on a plate-like structure is determined by locating a transducer on the surface of the structure at a position remote from the location of the transient stress wave event. Lamb waves resulting... | 08/25/1987 |
| 4522063 | Methods and apparatus for indicating selected physical parameters in a pipeline A method of detecting inadequately supported sections or overloaded points in a pipeline including the steps of traversing the interior of the pipeline with an instrumentation pig, sequentially striking or vibrating the wall of the pipeline by means carri... | 06/11/1985 |
| 4446734 | Motor driven exciter A hammer-type device is driven by a cam and spring arrangement in reciprocating motion to strike a moving train wheel for producing vibrations therein which are used to detect defects in the wheel.... | 05/08/1984 |
| 4389892 | Reverberation characteristics measuring device A device for measuring reverberation characteristics in a reverberation room by a digital squaring and integrating computation process. According to the invention, only a part of digital data of a large word length obtained by squaring and integrating a r... | 06/28/1983 |
| 4272990 | Device for the measurement of acoustic reverberation time and method A device for measuring acoustic reverberation time incorporates a transmission unit and a reception unit combined together into one assembly. Both units share a single series of filters, one of which filters is inserted into a signal path for the transmis... | 06/16/1981 |
