Abstract: The present invention provides a mutant beetle luciferase and the like, having mutation in which the amino acid corresponding to valine at position 288 in the amino acid sequence of wild-type Photinus pyralis luciferase is isoleucine, leucine or phenylalanine, mutation in which the amino acid corresponding to leucine at position 376 in the aforementioned sequence is proline, mutation in which the amino acid corresponding to glutamic acid at position 455 in the aforementioned sequence is valine, alanine, serine, leucine, isoleucine or phenylalanine, or mutation in which the amino acid corresponding to glutamic acid at position 488 in the aforementioned sequence is valine, alanine, serine, leucine, isoleucine or phenylalanine, in the amino acid sequence encoding a wild-type beetle luciferase, and characterized in that a luminescence intensity due to a luciferin-luciferase luminescence reaction in a 0.9% by mass NaCl solution is 50% or more of that in a NaCl-free solution.

Abstract: The present invention provides a mutant beetle luciferase and the like, having mutation in which the amino acid corresponding to valine at position 288 in the amino acid sequence of wild-type Photinus pyralis luciferase is isoleucine, leucine or phenylalanine, mutation in which the amino acid corresponding to leucine at position 376 in the aforementioned sequence is proline, mutation in which the amino acid corresponding to glutamic acid at position 455 in the aforementioned sequence is valine, alanine, serine, leucine, isoleucine or phenylalanine, or mutation in which the amino acid corresponding to glutamic acid at position 488 in the aforementioned sequence is valine, alanine, serine, leucine, isoleucine or phenylalanine, in the amino acid sequence encoding a wild-type beetle luciferase, and characterized in that a luminescence intensity due to a luciferin-luciferase luminescence reaction in a 0.9% by mass NaCl solution is 50% or more of that in a NaCl-free solution.

Abstract: This channel simulation device is provided with a memory for storing a distance calculation parameter and reception strength calculation parameter, and a processor for estimating desired-wave reception strength and interfering-wave reception strength on the basis of the distance calculation parameter and the reception strength calculation parameter. The desired-wave reception strength refers, for each set of two areas selected from a plurality of areas, to reception strength when a transmission signal transmitted from the wireless microphone of one area is received by a receiver in the one area. The interfering-wave reception strength refers to reception strength when a transmission signal transmitted from the wireless microphone of the other area is received by the receiver in the one area.

Abstract: A microphone array includes an n microphone units (where n is an integer equal to or larger than three). A first one of the microphone units includes three microphones ((14-1 through 14-3)) arranged in line at equal intervals. An m-th microphone unit (where m is a positive integer expressed by 1<m<n) includes the microphones at either end of an (m?1)-th microphone unit, and another microphone spaced from the microphone at one end of the (m?1)-th microphone unit by a distance substantially equal to the distance between the microphones at either end of the (m?1)-th microphone unit, and disposed at a location on the side of the (m?1)-th microphone unit opposite to the side where the microphone at the one end at the one end of the (m?1)-th microphone unit is disposed.

Abstract: Problem to be Solved To effectively operate a microphone array provided with a sound source position estimating function. Solution A microphone control system of the present invention is realized by the use of a tablet-type computer, for example. On the display of the control system, a two-dimensional simulation diagram 302, for example, simulating the space in which the microphone array is disposed. An array mark 304 simulating the exterior shape of the microphone array is displayed on the simulation diagram 302. Further, a sound source mark 316 indicating the position of the sound source estimated by the microphone array is displayed on the simulation diagram 302. Thus, an operator can intuitively find the position of the sound source in the space in which the microphone array is disposed, by referring to the simulation diagram 302, the array mark 304 and the sound source mark 316 displayed on the simulation diagram. Thus, the usage of the microphone array is improved.

Abstract: A microphone array includes an n microphone units (where n is an integer equal to or larger than three). A first one of the microphone units includes three microphones ((14-1 through 14-3)) arranged in line at equal intervals. An m-th microphone unit (where m is a positive integer expressed by 1<m<n) includes the microphones at either end of an (m?1)-th microphone unit, and another microphone spaced from the microphone at one end of the (m?1)-th microphone unit by a distance substantially equal to the distance between the microphones at either end of the (m?1)-th microphone unit, and disposed at a location on the side of the (m?1)-th microphone unit opposite to the side where the microphone at the one end at the one end of the (m?)-th microphone unit is disposed.

Abstract: Provided is a loudspeaker system capable of easily determining control parameters for controlling the directional characteristics of a speaker set including two or more speaker units. The loudspeaker system is configured to include: a speaker set 11 including two or more speaker units 2; a camera 15 adapted to photograph an acoustic space of the speaker set 11; a monitor 22 adapted to display a camera image 30 photographed by the camera 15; and a directional control parameter generating part 24 adapted to generate directional control parameters providing the directional characteristics of the speaker set 11.

Abstract: To provide a speaker apparatus that can detect miswiring to a speaker unit or trouble of a speaker unit itself. The speaker apparatus is configured to include: two or more speaker units 11 that are arranged in a speaker housing 10; a sensor microphone 12 that is arranged in the speaker housing 10 and outputs a sound collection signal 6; a target unit selection part 20 that selects any one of the speaker units 11 as a target unit; a sound signal supply part 21 that supplies an external sound signal 4 to the target unit; and an error detection part 25 that provides an error output on the basis of the external sound signal 4 and the sound collection signal 6.

Abstract: A microphone array includes an n microphone units (where n is an integer equal to or larger than three). A first one of the microphone units includes three microphones ((14-1 through 14-3)) arranged in line at equal intervals. An m-th microphone unit (where m is a positive integer expressed by 1<m<n) includes the microphones at either end of an (m?1)-th microphone unit, and another microphone spaced from the microphone at one end of the (m?1)-th microphone unit by a distance substantially equal to the distance between the microphones at either end of the (m?1)-th microphone unit, and disposed at a location on the side of the (m?1)-th microphone unit opposite to the side where the microphone at the one end at the one end of the (m?)-th microphone unit is disposed.

Abstract: Problem to be Solved To effectively operate a microphone array provided with a sound source position estimating function. Solution A microphone control system of the present invention is realized by the use of a tablet-type computer, for example. On the display of the control system, a two-dimensional simulation diagram 302, for example, simulating the space in which the microphone array is disposed. An array mark 304 simulating the exterior shape of the microphone array is displayed on the simulation diagram 302. Further, a sound source mark 316 indicating the position of the sound source estimated by the microphone array is displayed on the simulation diagram 302. Thus, an operator can intuitively find the position of the sound source in the space in which the microphone array is disposed, by referring to the simulation diagram 302, the array mark 304 and the sound source mark 316 displayed on the simulation diagram. Thus, the usage of the microphone array is improved.

Abstract: Provided is a loudspeaker system capable of easily determining control parameters for controlling the directional characteristics of a speaker set including two or more speaker units. The loudspeaker system is configured to include: a speaker set 11 including two or more speaker units 2; a camera 15 adapted to photograph an acoustic space of the speaker set 11; a monitor 22 adapted to display a camera image 30 photographed by the camera 15; and a directional control parameter generating part 24 adapted to generate directional control parameters providing the directional characteristics of the speaker set 11.

Abstract: Provided is a wireless microphone system comprising a microphone and a wireless receiver, wherein the wireless microphone system is provided with: a normal communication mode in which communication is performed by using a normal unique word (UWN) preset in both the microphone and the wireless receiver devices; a confidential setting mode in which a confidential unique word (UWX) is transmitted without being set in either of said devices; and a confidential communication mode in which communication is performed by both said devices by using the confidential unique word (UWX) set by the confidential setting mode.

Abstract: The present invention provides a dome diaphragm having high strength wholly and uniformly while maintaining a small thickness of a dome portion. A diaphragm 1 according to the present invention is a dome diaphragm including a dome portion 2. The dome portion 2 is divided into a plurality of small portions 4, and a ridge portion 7 is formed at a boundary of the small portions 4. In accordance with this configuration, the ridge portions 7 exist over the entire dome portion 2, and the ridge portions 7 can serve as frames for reinforcing the dome portion 2.

Abstract: 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.

Abstract: Provided is a wireless microphone system comprising a microphone and a wireless receiver, wherein the wireless microphone system is provided with: a normal communication mode in which communication is performed by using a normal unique word (UWN) preset in both the microphone and the wireless receiver devices; a confidential setting mode in which a confidential unique word (UWX) is transmitted without being set in either of said devices; and a confidential communication mode in which communication is performed by both said devices by using the confidential unique word (UWX) set by the confidential setting mode.