SoundPLAN supports proposals to ISO/TR 17534-3:2015 and ISO 9613-2

SoundPLAN supports and complies with changes that have been proposed to ISO/TR 17534-3:2015, (, relating to acoustics software for the implementation of standards associated with the calculation of sound outdoors.

Additional recommendations have been proposed for the calculation method of ISO 9613‑2. This International Standard ISO 9613-2 outlines the measures necessary to ensure a high quality of calculation methods for acoustic measurement.

The Technical Report ( contains additional recommendations for the calculation method that are agreed on to be implemented in software quality ensured test cases with detailed results that allow checking the correct implementation and forms to declare conformity with these requirements by a specified software product. SoundPLAN is a member of the working group that has helped develop these new measures.

The recommended changes outlined to ISO 9613-2 will help improve the accuracy of calculated sound levels, which can currently differ significantly.


Acoustic Camera to improve efficiency of transmission tower inspection

Recently a worker got stung by a swarm of bees during his inspection work at a transmission tower near Shing Mun Reservoir. He had already lost his consciousness when he was rushed to the hospital. Transmission tower inspection is essential in tower maintenance yet can be a dangerous job: it involves tower climbing and subjects workers to other potential risks and bee sting is one of which.

In fact the accident could have been avoided if the worker had been assisted by some technological products. Norsonic Nor848A Acoustic Camera is one of the ideal choices, with which workers do not have to climb up the tower to work at height, but rather work on the ground. They can inspect the towers with the acoustic camera, which enables them to locate sound differences made by malfunctioning tower parts and take proactive action. The acoustic camera improves the inspection efficiency and reduces workers’ chance of accidents at work. For more information about the acoustic camera please visit here.

Nor848A Case study – Filming breakout noise from café and concert venue

A combined bar, bistro and concert venue in the city center has been renovated with a great emphasis on acoustic noise dampening. Nevertheless, the venue is still getting complaints from neighbours close by due to breakout noise from the location, especially during late night concerts. The establishment consists of a bar and bistro on the ground floor, with the concert venue on the floor above. The concert venue has several windows facing the outside street and neighbourhood buildings, and it was desirable to pin point any acoustic weaknesses in these windows. Also it was of interest to see if the wall itself needed additional measures, or if the main source contribution came from the windows alone.

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4dNoise Introduces Next Generation Acoustic Calibration System to Hong Kong in Meeting Local Relevant Requirements

airflow resistance measuring system nor1504A

4dNoise gladly introduces the next generation acoustic calibration system of Norsonic to Hong Kong with said calibration system designed to meet all the local requirements and international standards. It is a system that provides quick and accurate calibration of instruments for measuring sounds through three varying modes. Apart from the different modes, the system also comes equipped with test report generator which is fully configurable, not to mention it comes with incorporated self test functionalities.

Apart from the launch of the acoustic calibration system, there was a seminar that was held on November 2015 which has generated a lot of discussions and interests from many of its attendees. The attendees of the seminar came from various sectors, from the government, private laboratories and acoustic consultants from all over the country. Some of the topics that were discussed in the seminar tackled topics including the importance of calibration, the standards of calibrating sound level meters, maintenance of the system and more. The calibration system is important being that it is an off the shelf system that can possibly meet all the relevant requirements but only at costs that is but a fraction of those of 4dNoise’s competitors.

Basically, the next gen acoustic calibration system is an all-in-one system that is fully automated and is readily available for upgrade. This system also makes it possible for a person to build their very own acoustic calibration laboratory that conforms to the international standards such as DIN45657, IEC61672, IEC60651 and more. The acoustic calibration system also offers varying features such as test signals that comply with international standards on calibration and many others as well. As for the three different interface modes of the system, it can be manual, semi-automated or fully automated.

Additionally, when it comes to calibration of microphone’s frequency response, it uses acoustical or electrostatic method. Aside from all these, there are many other features that the system has to provide including the built-in self test functions and fully generated test report. Many of those who have been in the seminar have given positive reviews for the system. Some has even quoted that “The quiet chamber is very innovative,” and that “The sound isolating gadget is very handy and innovative.”This just shows how the new gen acoustic calibration system has provided great advantages when it comes to sound calibration. It can clearly change the way that the field of acoustics is today and lead it to a good future ahead of it.

To know more about the acoustic calibration system, please visit  For inquiries, please email at

Seminar on Acoustic Calibration System and Practices in Norway

You are cordially invited to attend the seminar on Acoustic Calibration System And Practices in Norway.

November 16, 2015   (9:30am-4:30pm)

Supreme Acoustics Meeting Room
Unit 3915, 39/F Hong Kong Plaza, 188 Connaught Road West, Hong Kong
(MTR HKU Station Exit B2)

Speaker: Mr Carlsen Thor of Norsonic Calibration Laboratory (Accredited by 
Norwegian Accreditation for calibration of microphones, sound level calibrators and meters.)

The seminar is free of charge for related professionals, and interested persons. Registration is accepted based on a first-come first-served basis.

Registration: Click here

RSVP by 10 Nov 2015
Ms. Janus 2376 4989

Tentative Agenda

  • The importance of calibration
  • Norsonic Lab & Calibration System
    • Nor1504 build up & details
  • Calibrating acoustical transducers
    • Sound calibrators & pistonphones
    • Condenser microphones
  • Calibrating sound level meters
    • The standards
    • What to test?
  • Acoustical references
    • Maintenance and re-calibration
  • Maintenance of the system
  • Uncertainty
    • How good are we really?
    • of measurements
  • Accreditation process

SoundPLAN 7.4 is ready for you! What’s New in SP7.4?


SoundPLAN version 7.4 is ready for you! Every SoundPLAN user with a new license (less than 12 months old) or with Update & Maintenance services will receive a DVD for a free upgrade.

What’s New in SoundPLAN 7.4?

  • 2D, 3D directivity re-designed
  • Buildings can now float and allow noise to pass underneath
  • Import of picture locations with GPS info
  • Calculate SWL Sound Power Level from measurement points
  • …. and many more

Download a full report of update in SoundPLAN 7.4 from here