IEC 60704-2-11:2025

Overview

IEC 60704-2-11:2025 - Part 2-11 of the IEC 60704 series - is the particular requirements test code for determining airborne acoustical noise from electrically‑operated food preparation appliances. This second edition (2025) replaces the 1998 edition and is a technical revision that must be used together with IEC 60704‑1:2021 (general requirements). The standard covers single‑function and multi‑purpose countertop, built‑in and hand‑held food preparation machines supplied from mains or batteries and performing functions described in IEC 60619.

Key changes in this edition include:

• Added definitions for various types of food preparation appliances
• Revised test conditions
• Removal of coffee mills and coffee grinders from the scope

Key topics and requirements

The standard supplements or modifies IEC 60704‑1:2021 and addresses practical test-code details specific to food preparation appliances including:

• Measurement methods: Direct and comparison methods for determining sound pressure and sound power levels.
• Acoustical environments: Guidance for free-field-over-reflecting-plane conditions, hard‑walled test rooms and special reverberation rooms, and associated corrections.
• Instrumentation: Requirements for microphones, acoustic measurement equipment, and instruments to record climatic and operating conditions.
• Operation and mounting: Procedures for equipping, pre‑conditioning, loading, location and mounting of appliances under test (including fixtures for hand‑held devices).
• Measurement procedures: Microphone arrays, measurement surfaces and recommended microphone positions; measurement uncertainties and corrections for background noise and environment.
• Calculation & reporting: Methods to calculate A‑weighted sound power/pressure levels, steps for averaging over positions, and detailed lists of information to be recorded and reported.
• Normative annexes: Standard test tables and test enclosure guidance; informative design guidelines for simple test rooms.

Practical applications and users

IEC 60704‑2‑11:2025 is intended for:

• Manufacturers - to design quieter appliances, validate noise performance and prepare compliant technical documentation.
• Independent test laboratories - to perform standardized acoustic testing and produce reproducible results.
• Product development and R&D teams - for noise benchmarking, design iterations and trouble‑shooting.
• Regulatory bodies and certification bodies - for conformity assessment and comparison with national/regional noise requirements.
• Quality control - to verify production consistency and support noise labeling or marketing claims.

Use cases include noise compliance testing for new models, comparative noise reporting, product improvement, and verifying acoustic performance in realistic operating conditions.

Related standards

• IEC 60704‑1:2021 - General requirements for airborne acoustical noise test code (mandatory companion).
• IEC 60619:1993 and IEC 60619:1993/AMD1:1995 - Reference for described functions of food preparation appliances.

Keywords: IEC 60704‑2‑11:2025, airborne acoustical noise, food preparation appliances, acoustic testing, sound power level, sound pressure level, household appliances, IEC 60704‑1.