Abstract: An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-3), (i-6) to (i-8), and (i-10) to (i-13).

Abstract: An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-5), (i-7) to (i-10), (i-12) and (i-14).

Abstract: Provided is a tea drink which contains at least a polyphenol, calcium and choline, and wherein the content of the polyphenol contained in 100 mL of the tea drink is 10 to 40 mg in terms of tannins, the content of caffeine contained in 100 mL of the tea drink is 2.0 mg or less and the calcium/choline ratio in the tea drink is 3 to 65. This drink is a tea drink in which a content of polyphenol is maintained within a fixed range and a content of caffeine has been reduced and after-astringency of the drink is improved.

Abstract: A mixed signal which contains a noise is inputted. Then, the signal is inverted and amplified by an inverting amplifier which has a high gain, and attenuated by a attenuator in order to generate an inverted phase signal. In a mixer, the inputted signal and the inverted phase signal are added, and outputted. Since the inverted phase component of the noise is added to the noise, the noise in the mixed signal is canceled. For the voice signal, an amplified inverted signal is generated by an invert amplifier. However, an amplitude is restricted due to a high gain. Since the amplitude is restricted, a level of the inverted phase signal is lower than a level of a voice signal. Even if the voice signal and the inverted phase component are added in the mixer, the voice signal is outputted almost thoroughly.

Abstract: A noise-controlled communication apparatus reduces an annoying effect to the other speaker due to an ambient noise on the transmitting side and improves articulation of the receiving voice under noise. In a noise-controlled communication apparatus, a transmitting level detector detects a transmitting level above a threshold. Then, a mode controller enters to a transmitting mode. When the mode controller enters to the transmitting mode, a control mode switching circuit reduces attenuation of a transmitting signal. When the noise-controlled communication apparatus detects a receiving signal, the mode controller enters to a receiving mode for passing through the receiving signal. When the transmitting signal and receiving signal are not detected, the mode controller enters to an idle mode for attenuating the transmitting signal and receiving signal to half.

Abstract: A hands-free speaking device is provided which is capable of removing ambient noise at the near side from the speech transmitting signal. The hands-free speaking device includes a speaker 51 for reproducing a received speech signal, a microphone 52 for outputting a speech transmitting signal, an echo canceler 55 for removing an echo 62 transmitted from the speaker to the microphone, and a voice detector 11 comprising a noise level monitoring circuit 2 for monitoring the level of the ambient noise 63 input to the microphone, a voice level monitoring circuit 3 for monitoring the level of voice signal 61 input to the microphone, and a comparator 4 for generating a signal for increasing the attenuation amount of an attenuator 10 to attenuate the transmitting speech signal when the noise level is higher than the voice level. Additional embodiments are discussed and include improvements which reduce the effects of ambient noise, howling, and line echo.

Abstract: A circuit for hands free talking is mounted between a telephone main body for use in a vehicle, and a speaker and a microphone to realize hands free talking of a user of the telephone. In the circuit, an electronic volume controller is for use in audio signal processing, and the electronic volume controller includes a transmitting variable attenuator, a receiving variable attenuator, and an attenuator controller. A receiving level detector is provided to detect a signal level of a receive signal from the telephone main body, and decreases attenuation of the receiving variable attenuator and increases attenuation of the transmitting variable attenuator when a high signal level is detected.

Abstract: The invention concerns a process for the manufacture of a decorative aluminum alloy product such as a watch case. In the first step, several aluminum sheets are united tightly into a stock by their overlapping and pressure-welding. The compacted stock is subjected to a forging step for agitating substantial part of the composite stock in its regularly laminated structure. Then, a watch case material is punched out from the composite stock which is further subjected to an anodically oxidizing step and a mirror finish step to provide the final product. The invention relates also the thus finished final product, having an attractive and contrasted flow design pattern on its exposed surface and in any section thereof.

Abstract: A white balance control system which has two amplifiers for red and blue video signals, two memory circuits for selecting the gains of the amplifiers in response to signals applied thereto, and two comparator circuits for comparing a green video signal with the red and blue video signals, respectively. The compared signals are respectively applied to the memory circuits selectively.