FAQs | Noise Control & Acoustics

What types of noise control solutions does Eldridge offer?

Eldridge offers a full range of noise and vibration control solutions including intake and discharge silencers, acoustic enclosures, duct silencers, fan noise attenuation packages, and custom-engineered noise abatement systems for buildings and process equipment. We also provide in-house acoustic design services for facilities with specific noise specifications.

What is a silencer and how does it work?

An industrial silencer (also called an attenuator or muffler) is a device installed in an airstream to reduce fan or equipment noise. It works by absorbing sound energy using acoustically treated baffles or chambers that dissipate sound waves while allowing air to continue flowing. Silencers are specified by the frequency and decibel reduction required, along with the acceptable pressure drop.

When do I need an acoustic enclosure instead of a silencer?

An acoustic enclosure is used when the noise source is the equipment itself — such as a generator, compressor, or fan motor — rather than airborne noise in a duct. Enclosures surround the equipment to contain noise radiated from its housing and structure. Silencers address noise traveling through the airstream. Many projects require both.

What is a noise specification and how do I know what mine is?

A noise specification defines the maximum allowable sound levels (in dBA) at a defined distance from the equipment or at a facility boundary. Noise specs are typically set by local permitting authorities, facility operators, or regulatory bodies. OSHA sets permissible noise exposure limits for workers at 90 dBA over an 8-hour shift. Eldridge’s acoustic engineers can help you interpret your specifications and design systems to meet them.

Can Eldridge perform acoustic design and modeling?

Yes. Eldridge has in-house acoustic engineering expertise to assess noise sources, model sound propagation, specify attenuation equipment, and verify compliance with your noise requirements. This service is available as part of our full-system design offering for industrial, power, gas pipeline, and marine projects.