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Noise Control

INERTANCE can design the powerful & compact noise control devices, which have been applied to various noise levels to keep the relevant noise limits (sound level). Noise reduction design includes the noise barrier, silencer & sound attenuator, acoustic louver, insulation, enclosure, sound absorption & transmission loss materials,etc.

INERTANCE has a capability to perform below kinds of noise control design.

  • Noise barrier
  • Sound Attenuator
  • Silencer
  • Stack Noise Control
  • HVAC Duct Noise Control
  • Sound Baffles
  • Noise level, Sound level study
  • Acoustic Louver
  • Noise Control & Mitigation
  • Room Criteria Assessment
  • Acoustic Insulation
  • Sound Absorption
  • Noise propagation
  • Material Transmission Loss
  • Frequency Spectrum Phenomenon
  • Noise reduction device design
  • Ear Protection

Many kinds of noise reduction facilities have been designed and installed as follows;

 

Noise control, Sound control
Noise control, Sound control

Sound Control

Acoustic enclosures have been designed to reduce the transmitted noise to sensitive receivers, and they have to be considered with combination of isolation, absorption, damping as well as ventilation. The thickness of acoustic transmitted panels has to be constructed with the dominant frequency of noise source, which should be installed to minimize any noise leakage. Large noise enclosure shall be sometimes designed in such way so that the operating and maintenance activities can be conducted.

Noise Reduction

Silencers have been applied to reduce the room background noise transmitted via duct system from air handling units, and to provide the effective ventilation as parts of acoustic enclosure together. The section areas of splitters have to be designed carefully in order to minimize the pressure drop of fluid, and it should be noted that the high velocity inside of silencer has possibility to generate self-exciting noise.

Noise Reduction Device
Noise Reduction Device

Sound Level

Silencer and acoustic louver shall be applied to reduce noise level in all opening area. However, it is sometimes limited to apply the silencer due to its large volume space with accessibility to equipment. In this case, the application of acoustic louver should be considered with optimized sizing.

Noise Level Control
Noise Level Control

 

Noise Level

Insulation has to be applied on surface of pipes, valves, pumps and compressors, etc. in order to reduce of the transmitted noise. These kinds of noise sources are caused from long pipe radiating the noise, and their thickness and material density have to be carefully designed with various experiences.

Sound Level Control, Insulation
Sound Level Control, Insulation

 

Noise Barrier

The location and height of noise barrier has to be carefully designed according to relation of source and receiver to provide the high efficiency for noise reduction. The materials of barrier have been selected based on their insertion loss as well as environment and customer’s requests.

Noise Barrier
Noise Barrier

INERTANCE has a capability regarding noise and vibration engineering, and our experts are familiar with assessment for Noise control design. For further information, contact us at (mountain@inertance.com).

INERTANCE’s related services include;


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HVAC Noise and Vibration control

HVAC equipment is the major sources of noise in building, and its effects on the speech interference & noise environment in each room have to be considered properly. INERTANCE can estimate the HVAC noise effects & duct noise based on sound criteria and designed the relevant noise and vibration control devices such as Sound attenuator and Silencer.

HVAC-Noise-Silencer-Design
HVAC-Noise-Silencer-Design

INERTANCE has a capability to perform below kinds of estimation for HVAC Noise.

  • Sound Attenuator & Silencer Sizing
  • Sound Chamber and Elbow
  • Duct Lagging
  • Acoustic Insulation for Plumbing Pipe
  • Indoor Noise Assessment
  • Noise Criteria (NC)
  • Room Criteria (RC)
  • Duct Break out Noise
  • Duct Break in Noise
  • Duct noise and Duct sound
  • Estimation for Insertion Loss
  • Acoustically Lined Rectangular Duct
  • Acoustically Lined Round Duct
  • Sound Transmission Loss
  • Sound Absorbing Materials

Sound Attenuator, Silencer

Airborne noise is passed through duct line of air supply/return system, and the sizing of duct silencer is the most important factor to determine the grade of noise & room criteria. INERTANCE has considered the transmission paths of noise and specification of air handling units in order to calculate the noise level in each room, and the Silencer (Sound attenuator) dimension has been calculated with proper air velocity as per room types.

Here, INERTANCE can show the various types of analysis for noise and vibration control as follows;

Sound-Attenuator
Sound-Attenuator

Duct Noise (Duct Sound) Assessment

The background noise related HVAC has to be considered for sound quality as per each room types. INERTANCE considers many possible sound transmission paths between noise source and receivers, and has determined to conduct the noise criteria assessment with noise and vibration control such as Sound attenuator and Silencer.

Duct Noise
Duct Noise

Here, INERTANCE can show the various types of analysis as follows;

HVAC-Noise-and-Vibration
HVAC-Noise-and-Vibration

INERTANCE has a capability regarding sound and vibration engineering, and our experts are familiar with assessment of HVAC Noise and vibration. For further information, contact us at (mountain@inertance.com).

INERTANCE’s Related Services include;