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GB/T 7313-1987Minimum performance requirements and methods of measurement for high fidelity loudspeaker systems (English PDF)

高保真扬声器系统最低性能要求及测量方法

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Issued by

National Bureau of Standards

Level / Type

National · Recommended

Issue date

February 27, 1987

Implementation date

November 1, 1987

Scope

GB/T 7313-1987 is the English-translated version of 高保真扬声器系统最低性能要求及测量方法.

GB/T 7313-1987 is the Chinese standard "Minimum performance requirements and methods of measurement for high fidelity loudspeaker systems". This standard is applicable to a baffle (the baffle wall and frame refers to the structure of the device) or a box of high-fidelity speaker system.

This standard does not apply to the speaker system with an active element and the speaker unit is not installed. It was issued by National Bureau of Standards. Issued on 2/27/1987, in force from 11/1/1987.

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Document preview — GB/T 7313-1987

National Standard of the People's Republic of China

ICS: 33.160.50
Classification: M72

Issued by: National Bureau of Standards

[Preview only]
1 Scope
1.2 Normative References
1.3 Picture types
2.1 Definitions
2.2 Types of Receivers
2.3 Peripheral Connectors
2.4 Measurements
2.5 Equipment classification
2.6 Receiver and transmitter
2.7 Power controls and supply network impedances
2.8 Voltage change and flicker
2.9 Plastic pipes and fittings
3 1 test device
3.1 General Conditions
3.2 Test Signals
3.3 Radiofrequency (r.f.) Television Signal
3.4 Radiofrequency Input Signals
3.5 Measuring System and Test Instruments
3.6 Standard Measuring Conditions
4 Sample 1 and Sample Preparation
4.1 Electrical and Mechanical Performance
4.2 Power Consumption
4.3 REQUEST/RESPOND ser vice
5 Test Procedure 2
5.1 Tuning Characteristics
5.2 Sensitivity
5.3 Selectivity and Response to Undesired Signals
5.4 Cement mortar
6 2 eligibility criteria
6.1 Characteristics of the Luminance Channel
6.2 Characteristics of Chrominance Channel
6.3 Balanced transmission procedures
6.4 Manhole (handhole) overlay and tunnel trench cover slab
6.5 Hole rings and covers
7 Results
7.1 General Properties of the Picture
7.2 Synchronizing Quality
7.3 Picture Size Stability Versus Changes of CRT Beam Current
7.4 Characteristics Inherent in Projection Type Displays
7.5 Characteristics Inherent in DCD Displays
7.6 Characteristics Inherent in Widescreen Displays
8 Characteristics Inherent in the Receivers Using Double-rate Scan Display
8.1 General
8.2 Preliminary acceptance
8.3 Final acceptance
9 Disturbance on the Picture Due to Signals Inserted into the Field Blanking Interval
9.1 Introduction
9.2 Method of Measurement
9.3 Presentation of Results

1 Foreword

GB/T 7313-1987 was issued by National Bureau of Standards on 27 February 1987 and has been in force since 1 November 1987.

The GB/T prefix marks a recommended standard. It is not law in itself: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

The document runs to 9 pages in English translation.

2 Scope Preview

This standard is applicable to a baffle (the baffle wall and frame refers to the structure of the device) or a box of high-fidelity speaker system. This standard does not apply to the speaker system with an active element and the speaker unit is not installed.

GB/T 7313-1987 falls under ICS 33.160.50, in the field of telecommunications.

This catalogue holds 1,124 other GB/T standards in that field.

In this catalogue, GB/T standards carry edition years from 1963 to 2026.

3 About this standard

Sector: National Standard (Recommended)

Issued by: National Bureau of Standards

English translation: about 9 pages (approximate)

Chinese original: about 13,111 characters

4 Related standards

Standards on related subjects:

GB/T 45715.1-2025 — Multimedia systems and equipment for vehicles - Surround view system - Part 1: General

GB/T 25102.7-2017 — Electroacoustics -- Hearing aids -- Part 7: Measurement of the performance characteristics of hearing aids for production, supply and delivery quality assurance purposes

GB/T 14471-2013 — General specification for headphones

GB/T 4959-2026 — Methods of measurement for the sound reinforcement characteristics of auditoria

GB/T 9397-2013 — General specification for electrodynamic loudspeaker of direct radiator type

GB/T 6278-2012 — Simulated programme signal

5 Classification and status

International classification (ICS): 33.160.50

Chinese Standard Classification (CCS): M 72

Prefix GB/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 9 pages — is available in the English PDF.

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