Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Design Example: Sustainability in Concrete Building

Design Example: Sustainability in Concrete Building

As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground cistern.

Sound as Pressure Waves

Sound as Pressure Waves

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...

Sound Waves: Interference

Sound Waves: Interference

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...

Soundness of Cement

Soundness of Cement

The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create ettringite,...

Sound Waves: Resonance

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...

Thermal Insulation in Masonry Walls

Thermal Insulation in Masonry Walls

In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Correction to: Global 30-Day Morbidity and Mortality of Primary Bariatric Surgery Combined with Another Procedure: The BLEND Study.

Obesity surgery·2026

Same author

Prognostic impact of heart failure guideline-directed medical therapy in patients with low blood pressure.

Kardiologia polska·2026

Same author

Process Strategies Enabling Selective Polymer Valorization from Textile Fiber Blends.

Materials (Basel, Switzerland)·2026

Same author

Sociodemographic, Clinical, and Therapeutic Characterization of Multiple Myeloma Patients (CharisMMa Study) with Symptomatic Relapse and/or Refractory Disease: An Observational, Multicenter Study in Portugal.

Hematology reports·2026

Same author

Opioid-free versus opioid-based anesthesia in laparoscopic bariatric surgery: an exploratory randomized pilot trial.

BMC anesthesiology·2026

Same author

An international multidisciplinary consensus statement on laparoscopic liver biopsy.

Cell reports. Medicine·2026

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

Sustainable Sound Absorption: A Critical Review of Material Innovation and Geometry-Driven Design.

Faouzia Tayari¹, Regina Silva¹, Bruno Godinho¹

¹CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.

|June 26, 2026

Summary

New sustainable sound absorbers utilize bio-based and recycled materials to meet circular economy goals. Hybrid approaches show promise for overcoming limitations in low-frequency absorption and durability.

Keywords:

3D-printed absorbers bio-based absorbers circular economy geopolymer-based absorbers recycled absorbers sound absorption

More Related Videos

A Stable Phantom Material for Optical and Acoustic Imaging

A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Related Experiment Videos

Last Updated: Jun 27, 2026

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

A Stable Phantom Material for Optical and Acoustic Imaging

A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Area of Science:

Materials Science
Acoustics
Sustainable Engineering

Background:

Growing demand for circular economy practices and CO2 reduction fuels innovation in sound absorption.
Traditional absorbers (mineral wool, foams) have high energy costs and rely on non-renewable resources.
Shift towards integrated solutions combining sustainability with structural design.

Purpose of the Study:

Review recent innovations in sustainable sound absorbers.
Analyze acoustic performance factors and additive manufacturing's role.
Identify challenges and future directions for sustainable acoustic materials.

Main Methods:

Literature review of sustainable sound absorbers based on bio-based and recycled materials.
Analysis of acoustic performance dependencies (pore structure, airflow resistivity, geometry).
Exploration of additive manufacturing (AM) for controlled absorber design.

Main Results:

Sustainable absorbers show promise, particularly those using bio-based and recycled materials.
AM enables geometry-controlled absorbers with advanced acoustic properties.
Low-frequency absorption, durability, and flame retardance remain key challenges.
Hybrid, multi-material strategies (e.g., geopolymers with fillers) offer solutions.

Conclusions:

Sustainable sound absorbers are advancing, driven by environmental goals.
Hybrid and AM-enabled designs are crucial for overcoming current limitations.
Further research is needed to enhance low-frequency performance and address practical concerns.