Abstract: Disclosed is an audio system including a group of loudspeakers that form a sound field by delivering into a single space sound signals passed through respective ones of a plurality of sound signal channels. This audio system is comprised of two characteristic-variable equalizers that are cascaded to each other to constitute a part of the sound signal channels; a sound field characteristics detecting part for supplying test signals through the sound signal channels and detecting sound pressure in the sound field and thereby obtaining a sound pressure signal; and a characteristics adjusting part for adjusting, based on the sound pressure signal, equalizing characteristics of the characteristic-variable equalizers individually and with respect to each of the sound signal channels. The sound field characteristics detecting part selectively generates test signals of different bands.

Abstract: The sound field reproducing apparatus includes: a signal obtaining unit which obtains input audio signals of plural channels; an effect adding unit which gives an effect on an output to a sound field; and an effect amount control unit which controls an amount of the effect based on a characteristic of the input audio signal. The sound field reproducing apparatus receives input audio signals of plural channels from a medium such as a DVD, and gives a sound effect to them to output. The amount of the effect given to the input audio signal is controlled based on the characteristic of the input audio signal, especially the cross correlation of the reverberation component between the channels.

Abstract: Disclosed is an audio system including a group of loudspeakers that form a sound field by delivering into a single space sound signals passed through respective ones of a plurality of sound signal channels. This audio system is comprised of two characteristic-variable equalizers that are cascaded to each other to constitute a part of the sound signal channels; a sound field characteristics detecting part for supplying test signals through the sound signal channels and detecting sound pressure in the sound field and thereby obtaining a sound pressure signal; and a characteristics adjusting part for adjusting, based on the sound pressure signal, equalizing characteristics of the characteristic-variable equalizers individually and with respect to each of the sound signal channels. The sound field characteristics detecting part selectively generates test signals of different bands.

Abstract: Stream audio signals input in channel input terminals (710FL, 710FR) of a large setting are passed through large high-bandpass filters (720) arranged identically to small high-bandpass filters (740) for extracting high-frequency components from stream audio signals input in channel input terminals (710C, 710SL, 710SR, 710SBL, 710SRB) of a small setting. The stream audio signals are also passed through large low-bandpass filters (730) for extracting low-frequency components blocked by the large high-bandpass filters (720). The extracted high-frequency components and the extracted low-frequency components are added together by large adders (780) so as to be output. Phases of the stream audio signals in different settings can be matched, thereby contributing to favorable reproduction.

Abstract: An automatic sound field correcting device executes a signal process to the plurality of audio signals on respective correspondent signal transmission paths, and outputs them to a plurality of correspondent speakers to correct sound characteristics on the respective signal transmission paths. Namely, a measurement signal is supplied to each signal transmission path, and a measurement sound corresponding to it is outputted from the speaker to a sound space. The outputted measurement sound is detected as a detecting signal. The frequency characteristic of the audio signal on each signal transmission path is corrected by an equalizer, and a gain value of the equalizer is determined by a correction amount determining unit. A frequency characteristics correction is performed predetermined times. At a first correction, the correction amount determining unit determines the correction amount by performing a frequency analysis, based on the detecting signal, i.e.

Abstract: A signal delay time measurement device outputs, to a sound space, a measurement signal sound corresponding to a measurement signal such as a pulse signal, and obtains a response signal indicating a response thereof. By comparing the response signal with a predetermined threshold, the signal delay time measurement device measures a signal delay time in the sound space. The signal delay time in the above-mentioned sound space includes a delay time other than the delay time caused by a transmission of a signal sound to the sound space, and the response signal cannot theoretically reach the signal delay amount calculating unit during the delay time. Therefore, the delay time calculating unit does not perform the comparison in a no-response period in which the response signal has not reached the delay time calculating unit yet. Thereby, it can be prevented that the signal delay time is erroneously calculated by an effect of a background noise during the no-response period.

Abstract: In a frequency characteristic adjustment apparatus incorporated in an audio system, a frequency characteristic of an audio signal is made to agree with a target frequency characteristic, thus providing an equalizing function. In the apparatus, by a frequency characteristic controller, a measurement signal is detected as a sound-collected signal that received by way of speakers/microphone, and the sound-collected signal is divided into a signal component falling into a one fixed-level band and one or more signal components falling into one or more variable-level bands. A relative level of the signal component in each variable-level band is estimated on the basis of a level of the signal component in the fixed-level band in the target frequency characteristic. Based on the estimated relative levels, the levels at equalizers are set, so that the levels of signal components of the signal are adjusted by the equalizers channel by channel.

Abstract: A characteristics measurement device is applicable to various kinds of measurement devices for measuring characteristics subjected to a measurement in a certain environment. The characteristics measurement device measures a noise level in the environment, and determines the noise state based on the obtained noise level. Then, the characteristics measurement device determines the number of times of measurement of the characteristics based on the noise state, and executes synchronized addition of the characteristics obtained by the plural measurements to output the characteristics. Thus, when the noise state in the environment of the measurement execution is preferable, the measurement is completed in the smallest number of times of measurement. Additionally, when the noise state of the environment is not preferable, the plural measurements are executed in order to obtain the desired noise state (e.g., S/N), and the results are synchronized and added.

Abstract: 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 generated. A reproduction process of reproducing the plural block sound data in the order forming the measurement sound data is executed plural times by shifting the block sound data reproduced first by one for each time. Thereby, the measurement sound is outputted. When the above reproduction process is executed plural times, detected sound data corresponding to the block sound data reproduced at the identical reproduction order for each time are operated, and a sound characteristic is determined. Thereby, it becomes possible to measure the sound characteristic in the period shorter than the measurement sound data of the predetermined time period.

Abstract: An automatic sound field correcting device applies signal processing onto audio signals of plural channels and outputs processed audio signals to corresponding plural speakers. The automatic sound field correcting device includes: a noise measuring unit for measuring environmental noise level; a signal level determining unit for determining a measurement signal level based on the environmental noise level; and a correcting unit for outputting a measurement signal having the determined measurement signal level to perform automatic sound field correction.

Abstract: 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 generated. A reproduction process of reproducing the plural block sound data in the order forming the measurement sound data is executed plural times by shifting the block sound data reproduced first by one for each time. Thereby, the measurement sound is outputted. When the above reproduction process is executed plural times, detected sound data corresponding to the block sound data reproduced at the identical reproduction order for each time are operated, and a sound characteristic is determined. Thereby, it becomes possible to measure the sound characteristic in the period shorter than the measurement sound data of the predetermined time period.

Abstract: An automatic sound field correcting device executes a signal process to the plurality of audio signals on respective correspondent signal transmission paths, and outputs them to a plurality of correspondent speakers to correct sound characteristics on the respective signal transmission paths. Namely, a measurement signal is supplied to each signal transmission path, and a measurement sound corresponding to it is outputted from the speaker to a sound space. The outputted measurement sound is detected as a detecting signal. The frequency characteristic of the audio signal on each signal transmission path is corrected by an equalizer, and a gain value of the equalizer is determined by a correction amount determining unit. A frequency characteristics correction is performed predetermined times. At a first correction, the correction amount determining unit determines the correction amount by performing a frequency analysis, based on the detecting signal, i.e.

Abstract: A signal delay time measurement device outputs, to a sound space, a measurement signal sound corresponding to a measurement signal such as a pulse signal, and obtains a response signal indicating a response thereof. By comparing the response signal with a predetermined threshold, the signal delay time measurement device measures a signal delay time in the sound space. The signal delay time in the above-mentioned sound space includes a delay time other than the delay time caused by a transmission of a signal sound to the sound space, and the response signal cannot theoretically reach the signal delay amount calculating unit during the delay time. Therefore, the delay time calculating unit does not perform the comparison in a no-response period in which the response signal has not reached the delay time calculating unit yet. Thereby, it can be prevented that the signal delay time is erroneously calculated by an effect of a background noise during the no-response period.

Abstract: In the automatic sound field correcting device, a plurality of audio signals to be reproduced by a plurality of speakers are input, and the signal processing is applied on the corresponding signal transmission paths. The measurement signal is supplied for the respective signal transmission paths, and output by the corresponding speakers. The sound of the output measurement signal is collected and the detection signal of the collected sound is generated. The equalizer gain values are determined based on the detection signals. By determining the identical equalizer gain values for the plural signal transmission paths for which the phases of the audio signals are to be matched, the phases of the signals on those signal transmission paths are matched, and the strange auditory feeling due to the phase mismatch can be reduced.

Abstract: An automatic sound field correction apparatus processes multi-channel audio signals on respective signal transmission lines and reproduces them via a plurality of speakers. When adjusting frequency characteristics of the signal transmission lines, a measurement signal is supplied to the signal transmission lines and measurement signal sounds are emitted from the respective speakers. Then, the measurement signal sounds during a direct sound period are detected as detection signals by a detection device such as a microphone. Equalizer gain values are set appropriately based on the detection signals, thereby adjusting the frequency characteristics of the signal transmission lines. During the direct sound period in which the measurement signal sounds are detected, since the measurement signal sounds do not contain a reverberant component, the frequency characteristics of the signal transmission lines can be adjusted mainly using the direct sounds.

Abstract: By the speaker detecting device, the test signal is supplied to the output terminal to which the speaker is to be connected. If a speaker is connected to the output terminal, the test sound is output via the speaker. If no speaker is connected to the output terminal, no test sound is output. The test sound detecting unit detects the test sound in the acoustic space and compares the signal level of the test sound with the predetermined threshold level, thereby to judge whether or not a speaker is connected to the output terminal.

Abstract: A glass funnel for a cathode-ray tube having a thick region is provided, which aims to suppress loss of glass temperature balance between a portion having a positioning reference portion formed therein and another portion around that portion during molding, thereby reducing occurrence probability of forming defect such as deterioration of flatness or dimensional error of the positioning reference portion. In the structure including a first region serving as a thick region formed around wide opening end having a wide opening of a funnel body portion and a second region serving as a thin region formed adjacent to the first region on the narrow opening end side closer than the first region, a positioning reference portion is formed only on an outside surface of the second region.

Abstract: In a frequency characteristic adjustment apparatus incorporated in an audio system, a frequency characteristic of an audio signal is made to agree with a target frequency characteristic, thus providing an equalizing function. In the apparatus, by a frequency characteristic controller, a measurement signal is detected as a sound-collected signal that received by way of speakers/microphone, and the sound-collected signal is divided into a signal component falling into a one fixed-level band and one or more signal components falling into one or more variable-level bands. A relative level of the signal component in each variable-level band is estimated on the basis of a level of the signal component in the fixed-level band in the target frequency characteristic. Based on the estimated relative levels, the levels at equalizers are set, so that the levels of signal components of the signal are adjusted by the equalizers channel by channel.

Abstract: A treatment instrument includes a first coil and a second coil that is different from said first coil. The first and second coils are connected to each other. An operation wire is inserted in the first and second coils, and a tip end of the wire is connected to a treatment device. Upon movement of the wire, the treatment device operates. A method of manufacturing such a treatment instrument includes inserting one end of the first coil and one end of the second coil in a connection pipe from opposite ends thereof, exposing both ends of the connection pipe and corresponding portions of the first and second coils. The portions exposed to the arc columns are melted and connected.

Abstract: On an inner wall of a side wall portion of a funnel, a pair of protrusions are integrally formed as glass buildups at positions separated by a predetermined distance from an anode button toward a side of a neck tube. The pair of the protrusions are formed symmetrically on both sides of a virtual baseline extending to an seal edge surface and the neck tube through the center of the anode button. The virtual baseline is an intersection between a virtual plane including a tube axis and the inner wall, and passes through approximately the center of the seal edge surface in the lengthwise side.