July 24, 2015

Write Your Thesis at INDUSTRONIC

– You study electrical engineering, informatics or media design?
– You approach the end of your studies and you are looking for a challenging topic for your Bachelor or Master thesis
– You want to gain an insight into a globally operating company with subsidiaries and partners all over the world?
– You want to learn from experts giving you the best support when writing your thesis while being able to work independently.

If all of this applies to you, then INDUSTRONIC is the right place for you.

As already mentioned in our blog posts “INDUSTRONIC furthers Education” and “The Engineers of Tomorrow” we seek to promote young talents and pave the way for the next generation of experts.

We are constantly looking for committed students who want to successfully start their careers with an internship, apprenticeship or by writing about an interesting topic in our company. Furthermore, INDUSTRONIC always encourages new ways of thinking and is pleased to implement innovative ideas.

What we look for
Interested and motivated students (Bachelor / Master / Diploma) who would like to work on the following topics in our company.

You may think of a different topic for your thesis? No problem. Write an unsolicited application to jobs@industronic.de communicating your ideas.

INDUSTRONIC is a leading international provider of industrial communication systems. For more than 50 years, our name stands for innovation, quality and service. We have worldwide subsidiaries and representative offices (e.g. in China, the USA and Singapore). Furthermore, our well-developed international partner network provides competent local support.

Write your thesis in close cooperation with our experts. We will support you at all levels while granting you the freedom to develop your own ideas (within a company).
At INDUSTRONIC you will gain a first insight into the working life before completion of your studies and perhaps you will have the chance to join our staff directly afterwards.

For further information on our company, please visit our corporate website under www.industronic.com.

We look forward to your application.


July 10, 2015

Get to know the NPA – Modular Design & Flexible Installation

The IP-based PA unit of the NPA series is used for intelligent public address solutions. It seamlessly interfaces with the INTRON-D plus communication and public address system via Ethernet/IP.

Its modular design offers individual combinations of slide-in amplifier modules and power supply units. They can be simply inserted and replaced on the back of the device. You can also install a redundant power supply unit and amplifier module to ensure uninterrupted operation. There is also the option to provide an additional NPA device as backup component (N+1 component redundancy) to comply with increased safety requirements.


Redundancy concept


Slide-in modules & units









You can start small with the basic coniguration offering 1 digital amplifier channel, up to 4 monitored speaker circuits and an output power of 300 Watts. If you require more amplifier power, you can easily expand your device at any time.

The NPA’s maximum configuration comes with 4 digital amplifier channels which can be used simultaneously, up to 8 monitored speaker circuits and a maximum output power of 600 Watts. Use several IP PA units to implement even more extensive solutions.

The NPA can be installed both as centralized or decentralized solution. If you decide in favor of a centralized installation, the NPA is usually mounted into a central exchange cabinet. For a decentralized installation, the device is installed indoors at different places throughout the plant and near the speakers. The short cable distances reduce cabling costs. In general, the NPA can be installed anywhere on the LAN treated as independent IP amplifier with integrated zone selection and optional speaker monitoring.


Decentralized installation of the NPA

If you are interested in this topic and want to learn more about our NPA series, have a look at our NPA brochure and NPA data sheet.

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Categories: Technology
June 25, 2015

Successful Training at the INDUSTRONIC Representative Office in Singapore

In order to further its prominent position in the South-East Asian region and to cultivate important partnerships two trainers from the Headquarters in Wertheim recently visited the INDUSTRONIC Representative Office in Singapore. Their mission was to hold a hands-on training and support efforts for networking of the partners.



Bobby Tay, the host of the event, invited local INDUSTRONIC partners to the Representative Office in Singapore. Altogether there were eleven participants including two experienced trainers from Germany. The goal was to unite partners from Korea, Malaysia and Vietnam and to provide new business opportunities, and offer superior quality training. These types of networking events allow for a valuable exchange and strategic cooperation.

The hands-on training was held with two demo systems configured as one system network. This was to demonstrate the features of INDUSTRONIC’s state of the art IP devices (e.g. IP-based PA unit (NPA), IP Outdoor Intercom Station (NRO), IP Desktop Intercom Station (Access Panel)). Furthermore, configuration, navigation and programming with the most current Config Manager software was on the agenda.

The training lasted for five days and was concluded with a relaxing dinner on the last evening. Altogether, the training session in South-East Asia was an overwhelming success for all participants!


June 12, 2015

PA Design – Sound studies – When your voice is understood Part 2 – The sound study

The sound study

As you might remember in our first post about ‘PA Design – Sound Studies’ we mentioned the needed data for the first step. For a real sound study we need further data in addition to the existing information.


Noise map
Basis of all calculations is the so-called noise map. The noise map can be generated in two ways; either to measure it with calibrated noise level meters or to compute it with a noise mapping / noise prediction software program.

The noise measurement can only be established on industrial plants if all machines and installations are in operation. The software calculation can only be executed if the data of all machines, buildings, structures, etc. is available. The calculation of noise maps can also be carried out by the customer or another 3rd party company.

A typical noise map looks like this one:


We can see different kind of noise sources (surface, point and/or line source).
Housings, buildings and other structures are also visible.
Different colors mean different noise levels.

The noise map – Import or rebuild

The most labor-saving method is if the noise prediction software has an export filter for our calculation software. In this case we can quickly import the noise map and continue with the proper work.

If there is no export noise map data for the calculation software available we must rebuild the noise map according to the supplied printed paper work and documents as precisely as possible. This work is very time consuming and not easy to handle.


Where are the speakers?

After generating the noise map we can now begin with placing the speakers depending on hazardous or non-hazardous areas.

There are several rules to be observed, here are examples for the most important ones:
a) The speakers should only cover the manned areas where workers could be present.

b) We must be aware of too high sound pressure levels, e.g. above 120 dB, due to potential hearing damages.

c) At an ambient noise above 85 dB additional flashing beacons should be installed.

d) Speakers should be mounted ≥ 3 meters above ground.

e) Hazardous areas with appropriate Ex-proof speakers.
…but there are some more…


Signal to noise

After placing and aligning the speakers, we calculate the sound map and at least the signal to noise map (SNR).

The sound map represents the radiated sound of the speakers at the listening plane without noise, whereas the signal to noise ratio constitutes the result of a mathematical calculation:

(dB_Signal_Map) – (dB_Noise_Map)

The signal to noise ratio should be ≥ 10 dB and should not exceed 20-25 dB. This may differ from standard to standard, country to country, and customer to customer.

From our experience with the above mentioned ratio (SNR) – beside other factors – a good intelligibility should be met.


This picture shows above area with placed (3 meters above ground) and aligned (-30° off horizontal axis) speakers, supported by 2 flashing beacons – the signal to noise ratio shows good coverage at nearly any point.


At the end

As you can see, a lot of data and work is needed to create a sound study. But when the project team works hand in hand, a well defined PAGA system with good intelligibility is the result.

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Categories: Technology
May 29, 2015

Alarms Can Save Lives

It is important for the staff of an industrial plant to pay close attention to alarms broadcasted via speakers or sirens in order to respond appropriately in case of an emergency (e.g. fire, gas alarm). Alarms usually consist of three pillars: acoustic signals, voice announcements, and visual signals.

Acoustic signals notify people of an emergency without giving additional information. This can be a short tone sequence which is played back prior to a voice announcement. The effect is that listeners focus on the announcement and suspend conversations or current activities.

In several industries (e.g. chemical plants), there are tone sequences for particular emergency situations specified by the plant operator due to standards or local legislation. When these acoustic signals (e.g. evacuation tone or fire alarm tone) are played back, emergency-trained staff immediately recognizes them and knows how to react. Click on the Play button to listen to a fire alarm tone example.

Voice announcements or voice messages can give precise and immediate information tailored to the type of emergency and your environment. They instruct people on how to respond appropriately in an urgent situation. (Example: “Attention! Attention! Fire detected on Floor A! Please keep calm and leave the building immediately. Go directly to the assembly point. Do not use the elevator.”). Listening to a human voice telling you what to do can also have a calming effect on people in emergency situations.

Voice announcements must inform people quickly and must be clear, concise and easy to understand for everyone. Hence, good audibility and sound level are very important.

Visual signals are usually flashing warning beacons which can be used as additional indicators of an alarm, especially in areas with high ambient noise levels.

The three pillars of an alarm

The three pillars of an alarm

Combining all three pillars described above in industrial environments is a good way to cover different local conditions. A pre-announcement tone which sounds familiar to the staff can attract the attention to the voice message which comes afterwards and which contains specific instructions. A flashing warning beacon is also helpful as a visual indicator of an alarm if the staff works in very loud environments.

INDUSTRONIC offers excellent audibility of acoustic tones and voice announcements even in extremely loud environments. Customized texts or tones can be pre-recorded and stored on our digital audio processor (DAP). You can configure them so that they are automatically played back in a particular case of emergency. A CD-ROM with various tone examples can be ordered from INDUSTRONIC. We also provide a wide range of flashing warning beacons with various lens colors and light options, also for use in potentially explosive areas.

If you have any questions regarding this topic or our product portfolio, please feel free to contact us.

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Categories: Knowledge
May 11, 2015

Exhibition Time Again

Trade fair season has started: It’s an exciting time of the year and INDUSTRONIC can hardly wait to meet customers and make new contacts at different trade fairs around the world.

Also in 2015 we are looking forward to introducing our company and our products to interested visitors at our booths.


OTC – Offshore Technology Conference otc-2015-promo

in Houston, TX, USA

NRG Center Hall, booth 4835

From May 4-7, our highly esteemed INDUSTRONIC Inc. colleagues were there for you at the NRG Park again.

At the German Pavilion, visitors had the chance to examine our new products and our Director of Operations was pleased to answer questions and give advice.



OGA – Oil & Gas Asia OGA 2015_text

in Kuala Lumpur, Malaysia

Hall 6, booth 6009

We are pleased to have the opportunity to get to know interested visitors in Asia and to introduce them to our products.


Join us at the OGA 2015 in the Kuala Lumpur Convention Center from June 2-4. INDUSTRONIC will be represented at Asia’s largest oil and gas industry event, supported by our new partner Bumi NetSys. At the German Pavilion, visitors will, among other things, experience our demo system as well as different application examples.


As always we look forward to your visit and are excited to make new contacts in the coming weeks.

Please feel free to visit our booth and learn more about our products.

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Categories: Industries
April 30, 2015

PA Design – Sound Studies – Part 1

When your voice is understood

Part 1 – Evaluation / Budget Planning

Do you remember past times?

In the past, say 30 years ago, a PA system was usually designed by experienced engineers and technicians, with more or less – good results.

There was no possibility to predict the dispersion of a speaker structure in an industrial area with their machines and installations and to calculate the effective signal-to-noise ratio due to poor computing power.

Therefore, some rules of thumb were developed to meet common and simple requirements.

And if there was no rule of thumb for your existing project?

…then the simple ‘The More the Better’ motto was applied…

And now?Checklist_PA

We at INDUSTRONIC work in a different manner. The PA design is strictly made and calculated with different software applications and hardware appliances. However for our design work we need more data from our customers than before.


To facilitate your work we prepared some checklists which retrieve the following data:

• Type of speaker/s
• Hazardous areas
• Ambient noise/s
• Plot plans of areas
• Buildings / Side views
• …

When we get this data back, our engineers can then calculate and create a bill of material (BoM) of the equipment required.


Ambient noise?

In some cases, while there is no ambient noise map available, there is a need to measure and map the ambient noise. This can be done by third party companies selected by the customer or by INDUSTRONIC.

For budget planning it should be sufficient to calculate only with a few ‘large surface noise carpets’ to build the noise map and obtain the amount of devices (speakers, flash beacons if noise > 85 dB).

The calculation program works with the simple ‘1/r inverse distance law’. Some parameters like speaker type, general absorption, general ambient noise, signal to noise and power tapping must be inserted additionally.


See the Results!

As a result we get the ‘undisturbed range’ of the speaker with the
parameters entered.

With this range we can calculate the total amount of speakers.

What about indoor areas?

In indoor areas like admin buildings, workplaces and living quarters there should be at least 1 (one) loudspeaker in each room with doors.


On the one hand it is due to regulations or standards, on the other hand it is logical that everybody should be alarmed in case of fire…


That’s all?

Not yet – some documents must be created where all speakers are correctly assigned to the places required.

For more precise sound planning some of our customers need a so-called sound study. But this is another story – learn more in our Part 2 of PA Design / Sound Studies.

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Categories: Technology
April 16, 2015

Quality Management System Successfully Recertified

DIN ISO 9001_2008 quality management system certificate_engl

Our new DIN ISO 9001:2008 Certificate is valid until April 2018

Once again, INDUSTRONIC has been recertified with the DIN ISO 9001:2008 certificate.

Every 3 years, a recertification audit takes place to renew the certificate for our quality management system. The audit is executed by an independent third party accreditation body (in our case DEKRA). In March, two external auditors visited the company to make sure that all our processes comply with the regulations of the DIN ISO 9001:2008 standard.

During their visit they questioned the managers and employees of several important processes. Beside others, the following teams were checked:

  • Product development
  • Production
  • Purchasing
  • Sales & Project Management
  • Project Engineering
  • Marketing

After thorough examination, our processes were found to be working fine. Further elements of the quality management system are the determination of customer satisfaction and the assessment of the management. We have fulfilled all necessary requirements and therefore, the audit was passed successfully.

The new certificate is now valid until April 2018. In the following two years, one surveillance audit per year is obligatory according to the DEKRA regulations.

Please click here to learn more about our quality management system.

April 2, 2015

“50 Years of Excellence” – INDUSTRONIC Celebrates its 50th Anniversary

Comedian Schorsch Bross on his unicycle

Comedian Schorsch Bross Juggling Rings on his Unicycle

On Saturday the 21st March, we celebrated our corporate anniversary with a great gala event. All employees were invited together with their partners. Even the CEOs of our subsidiaries from Bejing, the USA and Singapore joined us. Moreover, some friends of the company and representatives of the local politics, press and the Chamber of Industry and Commerce (IHK) came to the nicely decorated festival hall.


The magicians Joe Walthera & Pafema

The Magicians Joe Walthera and Pafema

The highlights of the evening were the amazing tricks of the two magicians Joe Walthera & Pafema who let a table fly above the stage and made white pigeons appear out of nowhere.


When comedian Schorsch Bross showed his abilities on juggling rings high upon a unicycle, the audience enthusiastically applauded. Together with a female singer, the local band “Würzbuam” ensured a good atmosphere.



IHK-Certificate of Honour for 50 years

Wolfgang Stallmeyer receives the IHK-Certificate of Honour

President and shareholder Wolfgang Stallmeyer welcomed the guests and gave a brief look back on the history of the company.

Then, greetings were delivered by the Mayor of Wertheim, Mr. Wolfgang Stein and by one of the original founders of INDUSTRONIC, Mr. Siegfried Köster. Professor Dr. Dieter Salch, whose role is head of the advisory board and company attorney, spoke about the beginnings and growth of INDUSTRONIC.

After that Mr. Christoph Geiger from the Chamber of Industry and Commerce Heilbronn-Franken handed over a certificate of honour for the 50th company anniversary to Wolfgang Stallmeyer.


After the speeches, the official part ended and Wolfgang Stallmeyer opened the buffet. The delightful international buffet offered specialties of four continents and was highly frequented. However, it was almost impossible to try all the different warm and cold dishes. Later, the guests could choose from a variety of cocktails and drinks at the bar. Others were just chatting or showed their dancing skills on the dance floor.

All employees and guests had an entertaining evening and will surely remember this successful gala event for a long time.

The band "Würzbuam" ensured a good atmosphere

The Local Band “Würzbuam” Ensured a Good Atmosphere


March 20, 2015


Today´s topic of INDUSTRONIC functions is the “Conference” where several members are connected with each other via a conference channel.

All Subscribers Can Speak to Each Other

You use conferences if you want to easily and quickly connect several subscribers from different locations. They can then talk about operational processes or discuss the next work steps, for example. Conferences are held in half-duplex mode. This means that the members can speak and listen alternately, but not simultaneously.

Step 1: Initiate a Conference

First, you trigger a group call or an all call to invite members to a conference. The members required are asked to log into the mentioned conference channel.

Step 2: Log In

To log into the conference each member presses the respective conference channel key at his station. Each member can now listen to all conversations held in this conference.

Step 3: Speak Into the Conference

To speak into the conference, a member presses the respective key at his station which is exclusively reserved for this purpose. He then keeps it pressed and speaks into the microphone (Push-to-Talk).

Communication Procedure

The following illustration shows the conference procedure in detail.




















































You can assign an individual priority for each conference. This means that an active conference overrides functions with the same or lower priority. A conference can only be interrupted by a voice connection or function with a higher priority.

Conference Master

For each conference you can optionally assign a master intercom station. Only this conference master can then initiate the conference and invite members. When the conference master logs out again, the conference is terminated and all other members are also logged out.

Download a more detailed version of this blog article as PDF here.

See also my previous articles about the functions group call, all call and two-way communication.