Industrial Silencers
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Industrial Silencers

SISCO designs and manufactures precision-engineered industrial silencers for the most demanding acoustic environments — from high-pressure vent stacks and gas turbine exhausts to defence wind tunnels and metro ventilation systems.

Product Overview

Silencing the world's
loudest processes.

SISCO Energy (formerly Acoustics India) has been engineering industrial silencers for over 38 years, delivering noise attenuation solutions across Oil & Gas, Power Generation, Defence, Aerospace, Mining and Transit infrastructure worldwide.

Our silencers are designed using advanced acoustic modelling and CFD simulation to achieve precise insertion loss targets — while maintaining full system pressure drop and flow performance. Every unit is manufactured to international codes and backed by in-house acoustic testing.

From standard off-the-shelf vent silencers to bespoke trisonic wind tunnel acoustic systems for DRDO, SISCO has the engineering depth to tackle any noise challenge in any environment.

Fan Blower Silencer
Design Technologies

Four Type of Silencer

SISCO selects and combines the optimal silencer design technology based on your noise spectrum, process gas, pressure and flow requirements.

01
Absorptive
Incorporates sound-damping materials (mineral wool, acoustic fill) within lined baffles or annular passages to absorb broadband noise energy from flowing gas or air. Highly effective across mid-to-high frequency ranges.
02
Reactive
Uses precisely dimensioned expansion chambers and resonator cavities to reflect and cancel acoustic energy at specific frequencies. Ideal for tonal noise, compressor pulsations and low-frequency dominated spectra without absorptive media.
03
Tuned Dissipative
Constructs precisely tuned cavities based on the Helmholtz Resonator principle to attenuate discrete frequency components. Provides exceptional insertion loss at targeted frequencies with minimal pressure drop — common in gas turbine intake systems.
04
Hybrid
Combines absorptive and reactive design elements into a single unit to address complex broadband-plus-tonal noise spectra. Engineered for high attenuation across the full audible range — typical in vent silencers, engine exhausts and wind tunnel systems.
Product Range

Our Offerings

Vent Silencer
Vent Silencers
For steam, gas and process vent stacks — designed to ASME/IBR codes for high-pressure, high-velocity applications.
Compressor Silencer
Compressor Silencers
Inlet and discharge silencers for reciprocating and centrifugal compressors — reactive and hybrid designs to address pulsation and broadband noise.
Fan Blower Silencer
Fan & Blower Silencers
Duct-mounted absorptive and reactive silencers for fans, blowers and HVAC applications across industrial and commercial facilities.
Gas Turbine Exhaust
Gas Turbine Exhaust Silencer
High-temperature exhaust silencers for gas turbines in power plants and combined-cycle facilities — engineered for thermal cycling, high flow velocity and long service life.
Gas Turbine Intake
Gas Turbine Intake Silencer
Tuned dissipative inlet silencers designed using Helmholtz resonator principles to attenuate compressor tonal noise without impacting turbine airflow or efficiency.
Engine Exhaust
Engine Exhaust Silencers
Industrial and marine engine exhaust silencers for diesel and gas engines — graded industrial, critical, super-critical and hospital-grade attenuation levels available.
Reactive Tuned Silencer
Reactive / Tuned Dissipative
Bespoke reactive and tuned dissipative silencers for applications where absorptive media is not permissible — clean steam, sterile or food-grade processes.
Metro Ventilation
Metro Station Ventilation
Splitter and duct silencers for metro, underground rail and tunnel ventilation systems — designed to meet stringent environmental noise limits in urban environments.
Mine Ventilation
Mine Ventilation Silencers
Heavy-duty silencers for mine shaft ventilation fans and surface fans — built for continuous 24/7 operation in harsh mining environments with high particulate loading.
Wind Tunnel Silencer
Wind Tunnel Silencers
Precision acoustic systems for subsonic, transonic and trisonic wind tunnels — supplied to DRDO and ADA for India's premier defence aerospace test facilities.
Gas Turbine Exhaust
Gas Turbine Exhaust Silencer
High-temperature exhaust silencers for gas turbines in power plants and combined-cycle facilities — engineered for thermal cycling, high flow velocity and long service life.
Gas Turbine Intake
Gas Turbine Intake Silencer
Tuned dissipative inlet silencers designed using Helmholtz resonator principles to attenuate compressor tonal noise without impacting turbine airflow or efficiency.
Vent Silencer
Blow off Silencer
For steam, gas and process vent stacks — designed to ASME/IBR codes for high-pressure, high-velocity applications.
Compressor Silencer
Compressor Silencers
Inlet and discharge silencers for reciprocating and centrifugal compressors — reactive and hybrid designs to address pulsation and broadband noise.
Fan Blower Silencer
Fan & Blower Silencers
Duct-mounted absorptive and reactive silencers for fans, blowers and HVAC applications across industrial and commercial facilities.
Metro Ventilation
Metro Station Ventilation
Splitter and duct silencers for metro, underground rail and tunnel ventilation systems — designed to meet stringent environmental noise limits in urban environments.
Mine Ventilation
Mine Ventilation Silencers
Heavy-duty silencers for mine shaft ventilation fans and surface fans — built for continuous 24/7 operation in harsh mining environments with high particulate loading.
Start your project

Any noise problem,
fully silenced.

Share your process data sheet, noise survey or acoustic specification and SISCO's team will respond with a complete technical proposal — silencer type, insertion loss prediction, material and delivery schedule.