GB/T 6278-2012 English PDF

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GB/T 6278-2012: Sound system equipment -- General -- Simulated programme signal
Status: Valid

GB/T 6278: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6278-2012	149	Add to Cart	2 days	Sound system equipment -- General -- Simulated programme signal	Valid
GB/T 6278-1986	199	Add to Cart	2 days	Simulated programme signal	Obsolete

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Basic data

Standard ID: GB/T 6278-2012 (GB/T6278-2012)
Description (Translated English): Sound system equipment -- General -- Simulated programme signal
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: M72
Classification of International Standard: 33.160.01
Word Count Estimation: 5,579
Older Standard (superseded by this standard): GB/T 6278-1986
Quoted Standard: GB/T 3241-2010
Regulation (derived from): National Standards Bulletin No. 41 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the analog program signal signal characteristics. This standard applies to all types of sound systems and equipment, and electro-acoustic measurement and calibration device characteristics.

GB/T 6278-2012: Sound system equipment -- General -- Simulated programme signal

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS33.160.01 M72 National Standards of People's Republic of China Replacing GB/T 6278-1986 Sound system equipment Overview analog program signal Issued on. 2013-06-01 2012-12-31 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard rule according to GB/T 1.1-2009 given draft. This standard IEC 60268-1. 1985 "Sound system equipment - Part 1. Overview" in Section 7 of the analog program signal equivalents. This standard replaces GB/T 6278-1986 "analog program signal." This standard and GB/T 6278-1986 compared to the main changes are as follows. --- The standard delete GB/T 6278-1986 in "Introduction", adding "Preface." --- The standard adds "Range" and "normative references." --- According to IEC 60268-1. 1985 contents Chapter 7 Delete the GB/T 6278-1986 in Figure 2b), which uses white noise source is eligible Have a circuit diagram of an analog filter program signal. The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This standard by the national audio, video and multimedia systems and equipment Standardization Technical Committee (SAC/TC242) centralized. This standard was drafted. Nanjing University Institute of Acoustics. Drafters of this standard. Shen Yong. This standard replaces the standards previously issued as follows. --- GB/T 6278-1986. Sound system equipment Overview analog program signal

1 Scope

This standard specifies the characteristics of the analog signal program signal. This standard applies to all types of sound systems and equipment, and electro-acoustic device characteristics measurement and calibration.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 3241-2010 electro-acoustics octave and fractional octave filters

3 signal characteristics

The simulation program signal is not clipped Gaussian noise steady weighted average power spectral density characteristics of such a signal containing multiple languages Music programs and various program source signals characteristics mean the average power spectral density is very similar. When using GB/T 3241-2010 specified When 1/3oct filter measurements, weighted power spectrum should be consistent with the provisions of the table and Figure 11. This pink noise signal can be obtained through the filter circuit shown in Figure 2. If appropriate, when measured with a narrowband signal, applied in Table 1 and the band relative power level specified in FIG. 1. (For information about how Use this signal amplifier and speakers especially for measurement and characterization of their characteristics are being studied.) Note. It should be noted that in the entire frequency band measured signal power level than the 1/3oct measured zero decibel high power level of about 12.5dB. Table 1 shows the analog signal power spectrum frequency Hz Relative power level dB Tolerance limits dB frequency Hz Relative power level dB Tolerance limits dB 20 125 -13.5 3.0 3.0 -0.5 0.6 0.6 25 160 -10.2 2.0 2.0 -0.2 0.5 0.5 31.5 -7.4 1.0 1.0 -0.1 0.5 0.5 200 40 -5.2 1.0 1.0 2500 0.5 0.5 50 -3.5 1.0 1.0 3150 0.5 0.5 63 -2.3 1.0 1.0 4000 0.5 0.5 80 -1.4 1.0 1.0 5000 0.5 0.5 100 -0.9 0.8 0.8 6300 0.5 0.5 ......

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