Low-frequency acoustic insulation with airflow.
Basslock® is a patented system designed to solve one of the most technically challenging problems in acoustics.
Why conventional materials are not enough at low frequencies.
Low-frequency sound insulation — below 250 Hz — is technically different from insulation at mid and high frequencies. The wavelength of low-frequency sound is longer, and its ability to bypass obstacles and propagate through structures is greater. Conventional porous and absorbent materials, effective for mid and high frequencies, only provide 2 to 5 dB of insulation at low frequencies.
This limitation becomes a real problem in industrial environments where noise sources generate significant emission in the low-frequency range — motors, compressors, HVAC systems, large machinery — and where airflow must be maintained for ventilation or equipment operation.
Closing the air passage increases acoustic insulation but prevents proper equipment operation. Conversely, ensuring ventilation limits low-frequency performance. This compromise is not adequately resolved by conventional solutions.
To date, no solution on the market combines a comparable level of low-frequency attenuation with simultaneous ventilation capability. That is the technical space that Basslock® occupies.
Basslock® is not a conventional material. It is a metamaterial.
An acoustic metamaterial is a structural system designed to exhibit physical properties that do not occur naturally in conventional materials. Rather than relying solely on material mass, the performance of Basslock® is governed by three principles:
Geometry
The spatial arrangement of the system determines how it interacts with sound waves in the low-frequency range.
Structural architecture
The internal panel configuration creates acoustic behaviours impossible to achieve with porous or conventional mass materials.
Controlled wave interaction
The system manipulates pressure waves to maximise attenuation at target frequencies without blocking airflow.
The result is a system that maintains effective attenuation in the low-frequency range without closing the air passage — something conventional solutions cannot achieve.
Acoustic insulation comparison
Attenuation (dB) by frequency band — conventional panel vs. Basslock® models
Indicative data based on acoustic chamber tests. Actual values may vary depending on configuration.
Performance verified in acoustic chamber.
The acoustic performance of Basslock® has been tested and verified in an acoustic chamber. Frequency-band attenuation data shows significantly superior performance compared to reference commercial panels in the low-frequency range.
A product family for specific applications.
Basslock® Panel
— Acoustic panel with airflow.Low-frequency acoustic insulation panel for machinery enclosures. The base configuration of the Basslock® system, designed for the acoustic treatment of systems that generate high noise levels during operation and require ventilation.
Basslock® MP LOUVER
— Acoustic panel with airflow.Low-frequency acoustic panel for air intakes and exhausts in ventilation systems, designed to work independently or in combination with dissipative silencers, optimising the balance between insulation and airflow.
Basslock® ROAD-TRAIN
— Acoustic barrier with DLR ≥ 40 dB.High-performance acoustic barrier system designed to achieve the highest levels of acoustic insulation on the market, with optimised low-frequency behaviour. Applicable to road, rail, and industrial infrastructure.
Basslock® SHUTTER
— Façade acoustic treatment.Advanced acoustic solution for façade protection against traffic noise, optimised for urban environments with high noise exposure. Integrates the Basslock® principle into exterior enclosure systems while maintaining ventilation.
Basslock® MUSIC
— Façades for event venues.High-performance façade solution for stadiums and event venues, designed for low-frequency control towards the exterior, maintaining required ventilation conditions and ensuring regulatory compliance and environmental compatibility.
Technical certifications of the system.
Basslock® system and product family with derived utility models.
Performance data verified in an accredited facility.
Certification from the Ministry of Science and Innovation accrediting SNA's R&D&I activity.
Add Basslock® to your technical offering.
We are looking for technical partners — distributors, installers, engineering firms — who want to offer their clients real low-frequency insulation solutions. Basslock® is not a catalogue product: it is a patented technology that solves problems other materials cannot.
Differentiating product
Patented technology with no direct competition in the low-frequency market with airflow. Offer your clients a solution no one else can provide.
Engineering technical support
SNA supports each project with calculation, simulation, and design adapted to the specific case. You don't just sell a product — you sell a complete solution.
On-demand manufacturing
Each system is manufactured to project specifications, with no inventory needed. You reduce risk and offer a customised solution.
How does it work?
Contact us
With project details or your commercial interest. We analyse your profile and market.
Technical evaluation
We assess technical feasibility and jointly define the optimal solution for each case.
Manufacturing and support
We manufacture, deliver, and provide support during installation. We accompany you from start to finish.