| TOA Corporation Patent applications |
| Patent application number | Title | Published |
|---|
| 20110291833 | INTERCOM EXCHANGE - An intercom exchange is connected to multiple terminals, and includes multiple communication paths, a digital switch circuit for switching connections between the terminals and the communication paths, and a CPU that controls the DSPs and the switch circuit. The CPU performs control for preferentially allocating a communication path to the first terminal, and the allocated DSP determines whether a sound from the first terminal that has been received as input via the switch circuit is an abnormal sound. Upon determining that the sound is an abnormal sound, the allocated DSP notifies the CPU, and upon receiving the notification, the CPU determines an alert destination based on the notification and performs alert processing for sending an alert to the alert destination. | 12-01-2011 |
| 20100296687 | Diaphragm and Speaker - The present invention provides a dome diaphragm having high strength wholly and uniformly while maintaining a small thickness of a dome portion. A diaphragm | 11-25-2010 |
| 20100189278 | PUBLIC-ADDRESS SYSTEM | 07-29-2010 |
| 20100027827 | SPEAKER SYSTEM - An object of the present invention is to provide a speaker system in which a woofer and a group of tweeters are substantially coaxially arranged, and sound waves emitted from the woofer and sound waves emitted from the tweeter are less likely to interfere with each other in at least one direction, and whose sound pressure frequency characteristics easily stabilize. A speaker system | 02-04-2010 |
| 20090303328 | SURVEILLANCE SYSTEM AND CONTROL APPARATUS THEREFOR - [Object] To provide a surveillance system having a wide range of applicability. | 12-10-2009 |
| 20090214054 | Noise Eliminating Apparatus - A noise eliminating apparatus includes a first microphone, a second microphone and a signal processing unit, the signal processing unit includes a linear prediction filter and a noise resynthesis filter, the linear prediction filter receives an output signal of the first microphone, predicts the output signal of the first microphone by linear prediction and generates a prediction signal, and the noise resynthesis filter is an adaptive filter which receives, as a main input signal, a first difference signal obtained by subtracting one of the output signal of the first microphone and the prediction signal from the other, receives, as an error signal, a second difference signal obtained by subtracting one of an output signal of the second microphone and an output signal of the noise resynthesis filter itself from the other, and updates a filter coefficient so that the error signal is minimized. | 08-27-2009 |
| 20090202087 | Wireless Microphone Device - To provide a wireless microphone device that enables a circuit board, which is to be provided with an oscillation circuit, to be decreased in size without deteriorating radiation characteristics. | 08-13-2009 |
