Impact noise performance  (IIC) assessment web-app development

To carry out a successful acoustic design of a building, noise impacts between rooms need to be controlled. The acoustic performance is now considered as mandatory for new buildings. ASTM E989-21 defined different ratings to assess the impact noise performance between two rooms such as IIC/AIIC. Considering the lack of existing tools to assess these criteria, and some difficulties to use the existing ones, A7hz induced an innovation project to develop a new Canadian software. The aim of the project is to create a web app to help acoustic and vibration professionals predict impact sound insulation performance between two rooms.

Read the article published for the Acoustic Week in Canada 2022


High-rise wood structure building – Acoustic and vibration conception guide

Considering the increase of high-rise wood structure building project and the positive environmental impact of this kind of project, A7hz developed this particular speciality to offer a high-level expertise for wood projects. “The devil is in details”, especially for wood projects as every junction details has to be optimized. A new acoustic guide for wood projects is being written to compile all our expertise on the subject.



Noise Urban Observatory –  Environmental science study on urban noise planning

The aim of this study was to collect best urban noise changes monitoring and planning practices around the world and to assess the possibility of their application in Canada and in particular in Montreal. In our Quebec context, it is not today possible to characterize the urban noise evolution over time because no precise and organized archives exist. The project aimed at first to identify the world organizations responsible for observing urban noise changes and then to collect monitoring, management and reduction of urban noise (direct or indirect) methods.

Request the 2023 report (Available for academics) by email at 


Station 7hz – Monitoring – Connected infrastructures and buildings – Noise, vibration and dust monitoring stations

Regulations are becoming more stringent and detailed with respect to environmental noise, vibration and air quality. We offer stand-alone (solar panels) or powered connected monitoring stations to collect the various data in real time and display them on the Web. The management of the alerts also makes it possible to ensure the respect of the defined thresholds. A new part a the project brings A7hz to develop an event detection algorithm in particular for planes, trains, conversation, etc.



App ClapReverb

Now available on the App Store! ClapReverb allows you to measure the reverberation time of a room with a simple clapboard and gives you recommendations on the acoustic quality of a room. In acoustics, the reverberation time (TR) is a criterion conventionally used to analyze the performance of a closed space. Is the room too reverberant or too dry? This application is a very useful tool for architects, interior designers, engineers and any other person wishing to take into account the acoustic factor in the design of their projects. The application makes it easy to measure reverb times and compare results with typical values. All this in a hand clap!

Download ClapReverb on the Apple Store

Read the article published at ICA2019

High Acoustic Quality of a Building – BAbel Method

BAbel is a method of evaluating the acoustic performance of a building. It ensures that all the acoustic details of a building are taken into account. Using the BAbel method is to ensure that the different spaces of a project have been designed for comfort and acoustic compliance. The method reviews all the possible aspects of acoustic and vibration transmissions (airborne, groundborne, hybrid, etc.) between the elements of a building in order to orient them towards the most suitable solutions. The interdependencies between the elements of a project and the different mitigation solutions are considered.



Tool for auralization

To be able to listen to the different performances of our solutions, we develop a tool for auralization. The goal is that our customers can use this system as a decision support tool to justify the costs generated by the various solutions offered.