ISO 14163:1998 PDF

Overview

ISO 14163:1998 - Acoustics: Guidelines for noise control by silencers provides practical guidance for selecting, specifying and applying silencers in gaseous media. It outlines terminology, performance characteristics and operational considerations for common silencer types (dissipative, reactive, resonator and blow-off). The standard is a guide for communication between users, suppliers and manufacturers rather than a detailed design manual.

Key topics and requirements

• Scope and purpose
  • Practical selection and specification of silencers for ducted and open-air applications where airborne sound cannot be controlled at the source.
• Types of silencers
  • Dissipative silencers (absorptive) - broad‑band attenuation via porous or fibrous linings.
  • Reactive and resonator silencers - attenuation by reflection and tuned resonances.
  • Blow-off silencers - for high‑pressure releases, reducing exit velocity and source interaction.
  • Active and adaptive systems are acknowledged but not covered in detail.
• Performance metrics
  • Insertion loss (Di), insertion sound pressure level difference (Dip) and transmission loss (Dt) as primary acoustic performance indicators.
  • Propagation loss (dB/m), discontinuity attenuation, outlet reflection loss, and regenerated (flow) noise.
  • Pressure loss (Δpt) limits must be specified and not exceeded.
• Specification essentials to agree
  • Required insertion loss or permissible sound pressure level at immission points.
  • Maximum allowable pressure loss, physical size constraints, materials and durability requirements.
  • Environmental and operational constraints (temperature, dust, corrosive gases, hygiene, fire/explosion risks).
• Selection, layout and design process
  • Use laboratory data (ISO 7235, ISO 11691), manufacturer data and validated calculation models; iterative prototyping and in‑situ verification (ISO 11820).
• Operational considerations
  • Effects of flow, abrasion, cleaning/decontamination, start‑up/shutdown behavior and corrosion.

Applications and users

ISO 14163 is applicable across industries where ducted or open‑path noise control is required:

• HVAC and building services engineers
• Acoustic consultants and noise control specialists
• Manufacturers and suppliers of silencers and ductwork
• Plant, compressor, turbine and engine system designers
• Safety and environmental compliance teams

Typical applications: HVAC noise control, ventilation openings, engine intake/exhaust, fans, compressors, turbines and blow‑off/pressure relief lines.

Related standards

Normative references cited by ISO 14163 include:

• ISO 3741, ISO 3744 (sound power determination)
• ISO 7235 (measurement procedures for ducted silencers)
• ISO 11691 (laboratory insertion loss measurement)
• ISO 11820 (in‑situ silencer testing)

ISO 14163 is a practical, application‑focused reference for specifying silencer performance, communicating requirements between stakeholders, and integrating acoustic performance with operational and safety constraints.