Insul release 9.020

INSUL Release 9.0.20, July 2019, is now available.
The update comprises tweaks and bug fixes for both Windows and Mac.
Changes include:
Improved Composite TL Calculator functionality in Mac version
Fixed bug in Double Floor (ISPL) calcs with no cavity infill
Minor printing improvements for Test Panel sizes
Improved Materials Editor closing routines
Revised update-checking routines to prevent hanging
Updated illustrations of cavity infill on file open
Bug fix for rain noise models for orthotropic panels

Insul release 9.019

Release 9.0.19 May 2019
* Updated illustration dimensions for Ceilings, Floors and Roofs
* Fixed bug with resetting material lists upon Materials Editor close
* Fixed illustration bug for plotting CompositeSteelFloor systems
* Updated Indoor/Outdoor Calculator for improved printing of third octave band tables
* Fixed Composite TL Calculator printing bug for single octave tables
* Increased Indoor/Outdoor Calculator area and volume size limits
* Improved recollection of model details for PIR and similar frame types
* Tidied Porous tab layout to prevent overlapping lists
* Updated display for Custom materials to show in blue font
* New items added to INSUL Materials list
* New items added to INSUL Floor Cover list
* New items added to INSUL Absorption list
* Minor amendments to printouts to better handle very long descriptions
* Minor translation updates for German and French

Iris at Philharmonie de Paris

IRIS at the new Philharmonie de Paris

IRIS was recently used by the MDA team at the commissioning of the new Philharmonie de Paris. IRIS proved to be an invaluable tool, achieving a full set of detailed measurements under challenging circumstances and a tight time frame (50 separate source/receiver measurements in 5 hours).

”IRIS performed flawlessly throughout the commissioning and the 3D rays enabled investigation of things instantly on site that would never have been possible with traditional measurement systems. The design of the hall is groundbreaking and being able to walk away with a 3D representation of the sound field in each position will also be invaluable for more detailed analysis in the future ” – Chris Day – Project Director

More about the measurements in the Philharmonie de Paris  PARIS – IRIS

IRIS is a new measurement system that promises to provide a dramatic step forward in being able to understand the acoustics of rooms. The system comprises a tetrahedral microphone that can resolve the sound field into different directions, and software that can analyse the signals from the four microphones and present the information in simple yet elegant way that aids ones understanding of the behaviour of the sound field.

  • IRIS is an affordable software and hardware 3D impulse response measurement system
  • Interactive 3D rotation and zoom
  • 3D colour-coded representation of sound rays
  • Length indicates relative sound intensity level, angle is the ray direction, and colour represents time of arrival
  • Specific angle and level information for individual rays for detailed analysis
  • Traditional omnidirectional waveform views
  • Broadband and octave band filtered views
  • EDT, T20, T30, D50, C80, Ts in octave band according to ISO 3382-1:2009
  • LF
  • G coming soon

More info in Products – IRIS


NEW! dBSea – Prediction of underwater noise

Despite what most people think the sea below surface is not very quiet. A lot of the sound sources are natural and is part of the background noise in the sea. Examples of natural noise sources are rain, interaction between wind and waves and also vulcanic activity can cause noise on far distance.

Many forms of marine life depend on sound for their communication, navigation and development. Noise generated by man can obstruct these vital functions and biologists are concerned about both physiological disorders as disorders in animal behavior. Especially in marine mammals, many species have very sensitive hearing. Noise generated by man in underwater environments include noise from ship traffic, pile driving and seismic surveys with impulse sources. EU Marine Directive descriptor 11 dictate that noise in the seas must not harm marine life. dBSea is a tool to comply with this Directive.

dBSea is a software for prediction of underwater noise. It uses several different prediction models and the user have full control over which to use depending on current application. The 3D model is built by importing bathymetry data and placing noise sources in the environment. Each source can consist of equipment chosen from either the standard or user defined databases. Noise mitigation methods may also be included. The user has control over the seabed and water properties including speed of sound profile (how the speed of sound changes with water depth), temperature, saltinity and current.

Noise levels are calculated throughout the entire project area and displayed in 3D. To examine results in more detail, levels may be plotted in cross sections or a detailed spectrum may be extracted at any point in the 3D calculation area.

More info about dBSea under products/dBSea


Vibraphon was present at BNAM in Stockholm 20-22 June.

One paper was presented, ”Using Wave Based Geometrical Acoustics (WBGA) to investigate room resonances”. The paper was written together with Pemard.

Download paper   Download presentation

Nya funktioner i Iris

Nya funktioner i Iris

Med IRIS gör man mätningar av en rad rumsakustiska parametrar varav många tidigare har varit svåra att mäta, t ex lateral fraction. Nu har utvecklingen av IRIS tagit ytterligare ett steg framåt.

Den senaste versionen är nästan klar och med den kan man mäta parametrar för taluppfattbarhet.

Den nya versionen kommer att kunna mäta:

  • speech transmission index (STI according to IEC 60268-11 Ed. 4)
  • spatial decay rate (D2,S)
  • level of speech at 4 m from source (Lp,A,S,4m)
  • distraction distance (rd)
  • privacy distance (rp)
  • VDI 2569 room acoustic class

Dessa nya parametrar är beräknade enligt två nyligen publicerade standarder, ISO 3382-3:2012 Acoustics — Measurement of room acoustic parameters — Part 3: Open plan offices and VDI 2569:2016-02-Draft Sound protection and acoustical design in offices.


RAP-ONE har släppts i en helt omarbetad version med ny beräkningsalgoritm (pyramid tracing) samt nytt 3D gränssnitt. I övrigt samma enkla handhavande som gör RAP-ONE till ett populärt program för att kartlägga buller inomhus samt studera rumsakustik.