IEC 61988-2-5:2012

Overview

IEC 61988-2-5:2012 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the measuring methods for characterizing the acoustic noise performance of Plasma Display Panels (PDP). As part of the IEC 61988 series, this document focuses explicitly on standardized procedures to accurately assess the audible noise generated by PDP modules during operation. Acoustic noise measurement is essential to ensure the quality and user comfort of plasma display technologies, as noise can affect the viewing experience and indicate device performance.

This standard provides a comprehensive framework for conducting reproducible, reliable acoustic noise measurements, including equipment specifications, environmental conditions, measurement points, test signals, and reporting guidelines. Understanding and applying IEC 61988-2-5 supports manufacturers, testers, and quality assurance professionals in delivering plasma displays that meet global noise performance benchmarks.

Key Topics

• Scope of Measurement IEC 61988-2-5 outlines methods specifically for acoustic noise generated by plasma display modules, caused by panel vibrations, electrical components, wiring, and circuits.

• Measurement Environment Measurements must be performed in controlled settings-preferably an anechoic chamber or a silent room-ensuring minimal background noise and sound reflection, following ISO 7574-1 guidance.

• Standard Measuring Conditions Tests are conducted at 25 °C ± 3 °C, relative humidity between 25% and 85%, and atmospheric pressure between 98 kPa and 104 kPa to simulate typical operational environments.

• Equipment Requirements Essential equipment includes:

  • Anechoic chamber or silent room
  • Calibrated sound level meter compliant with IEC 61672-1
  • Pattern generator for input video signals The use of microphones with FFT analyzers is also supported if calibrated against standard sound level meters.

• Measurement Setup and Procedures

  • The PDP module is placed with the microphone aligned perpendicular to the center of the screen.
  • The standard measuring distance is set to 1 meter, with measurements taken on both front and rear sides of the module.
  • The module must be warmed up for at least 30 minutes under full white screen conditions to stabilize temperature and gas pressure, as these affect noise levels.
  • Test signals include full screen white at 100%, full screen black, and other relevant specified signals.

• Data Acquisition and Reporting Acoustic noise is measured across 1/3 octave bands in the frequency range of 250 Hz to 20,000 Hz. Results are calculated into an overall acoustic noise level (L) and compiled into standardized measurement reports detailing equipment, environmental conditions, measurement points, and signal types.

Applications

The IEC 61988-2-5 standard plays a critical role in the plasma display manufacturing and testing process by:

• Ensuring comparable and reproducible acoustic noise measurements worldwide to maintain product quality and consistency.
• Supporting plasma panel manufacturers in design optimization to reduce operational noise, enhancing end-user experience.
• Assisting regulatory bodies and conformity assessment entities in noise compliance verification for plasma display products.
• Providing guidance for research and development teams focusing on acoustic performance improvements.
• Enabling quality assurance teams to monitor acoustic characteristics during production to uphold standards.

This standard benefits industries where plasma displays are deployed, including consumer electronics, broadcast monitors, and professional-grade visual equipment, helping deliver quiet, high-performance displays.

Related Standards

IEC 61988-2-5 is part of the larger IEC 61988 series concerning plasma display panels, complementing these standards:

• IEC 61988-1: Terminology and letter symbols for plasma display panels-provides fundamental terms used across the series.
• IEC 61988-2-1: Measuring methods for optical and optoelectrical characteristics of PDPs-defines environmental and test conditions used with acoustic noise measurement.
• IEC 61988-4: Climatic and mechanical testing methods for plasma display panels-supports environmental conditions impacting noise generation.
• IEC 61672-1: Electroacoustics - Specifications for sound level meters-sets requirements for sound measurement instruments used in this standard.
• ISO 7574-1: Statistical methods for determining noise emission values-provides guidance on acoustic measurement methods, referenced for anechoic chamber specifications.

Conformance with IEC 61988-2-5 alongside these associated IEC and ISO standards ensures a holistic approach to plasma display testing, covering electrical, optical, mechanical, climatic, and acoustic performance aspects.

Keywords: IEC 61988-2-5, plasma display panels, PDP acoustic noise, plasma display noise measurement, IEC plasma standards, sound level meter, anechoic chamber, silent room, plasma module noise test, acoustic noise standard, plasma display testing methods.