KS B ISO 11204:2007 聲學(xué).機(jī)器和設(shè)備發(fā)射的噪聲.工作場(chǎng)所與其他指定位置測(cè)量噪音聲壓級(jí).環(huán)境修正指數(shù)要求法

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Acoustics-Noise emitted by machinery and equipment-Measurement of emission sound pressure levels at a work station and at other specified positions-Method requiring environmental corrections

KS B ISO 11205:2007 聲學(xué).機(jī)械和設(shè)備發(fā)射的噪聲.決定工作場(chǎng)所與使用聲強(qiáng)的其他指定場(chǎng)所噪音聲壓級(jí)的工學(xué)方法

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Acoustics－Noise emitted by machinery and equipment－Engineering method for the determination of emission sound pressure levels in situ at the work station and at other specified positions using sound intensity

SJ/T 10521-1994 錄像機(jī)生產(chǎn)線質(zhì)量控制指南

本標(biāo)準(zhǔn)提出了VHS錄像機(jī)生產(chǎn)線在產(chǎn)品制造過程中質(zhì)量控制應(yīng)遵循的原則和指南，以保征和提高產(chǎn)品質(zhì)量。 本標(biāo)準(zhǔn)適用于VHS錄像機(jī)生產(chǎn)線的質(zhì)量管理和控制。

Guideline for quality control for producting line of video tape recorders

ITU-R REPORT M.778-2-1990 為聽障人士設(shè)計(jì)的無線通信系統(tǒng)

Many forms of hearing impairment cannot be satisfactority improved by the provision of amplification only. Difficulties such as distortion in the residual hearing, loss of binaural directivity, emphasis of environmental noise and room reverberation lead to the use of systems incorporating the placement of the microphone near to the speaker rather than to the listener.

Wireless communication systems for persons with impaired hearing

ITU-R REPORT M.1025-1-1990 無繩電話的技術(shù)和操作特征

The major characteristics of some cordless telephone systems are given in Part B of this Report together with a brief description and other aspects of system operation.

Technical and operating characteristics of cordless telephones

ITU-R REPORT M.741-3-1990 用于調(diào)度業(yè)務(wù)的多渠道陸地移動(dòng)系統(tǒng)(包括或不包括公用電話交換網(wǎng)互連)

Radio spectrum allocated for dispatch traffic is becoming increasingly congested and already many users (networks) have to share a channel with several other users. This practice employs the channel more effectively but gives the participands a reduced "grade of service" in the sense that they may often have to wait for some time for a channel to become free and they suffer from reduced privacy.

Multi-channel land mobile systems for dispatch traffic (with or without PSTN interconnection)

ITU-R REPORT M.739-1-1986 介于25至100 MHz之間的地面移動(dòng)通信業(yè)務(wù)中的互調(diào)產(chǎn)物產(chǎn)生的干擾

Some cases occur with varying probablity and varying severity. They may be reduced by equipment design or careful choice of channels, but solutions of the latter type to one case of intermodulation may increase another.

Interference due to intermodulation products in the land mobile service between 25 and 100 MHz

ITU-R REPORT M.588-1-1978 海上移動(dòng)通信業(yè)務(wù)和海事衛(wèi)星移動(dòng)業(yè)務(wù)中透過結(jié)合金屬及射頻電路的黑白傳真?zhèn)鬏?/a>