Custom moulded earplugs for the well-being of your employees

Cotral Lab's custom moulded earplugs outperform all other devices on the market. They enable interpersonal communication and are very comfortable to wear, convenient and cost-effective.

Custom Moulded Earplug 3D scanning process

How do we create your custom fit earplugs?

Our manufacturing process works as follows:

  • We take an impression, or mould, of the ear canals of every employee
  • The mould is 3D scanned to create a computerised image
  • The computerised image is then modelled into the smallest, lightest and most comfortable ear plug ever made

This comprehensive process ensures that each hearing protection device fits perfectly (not silicone earplugs manualy-made), with 100-micron precision (the width of a strand of hair). They are so comfortable that they can be worn all day.

Be Protected, not isolated (adapted noise reduction)

The high quality moulded ear plug is personalised for each employee thanks to our filter selection process

SAPAN® considers the noise level, level of perception, and the unique requirements of each employee.

The manufacture of our custom-made hearing protectors

The evolution of our custom-made hearing protectors

The best of hearing protection

With Qeos, IT1 & Clear your employees are perfectly protected throughout their professional activity

Need to be connected ?


Connected custom hearing protection

  • Smart communication
  • Custom-made protection
  • Convenient

Need to communicate?

Qeos Green

 Qeos Green hearing protection devices

Very noisy environment?

Qeos Orange

Qeos Orange custom earplugs

Need to focus?


Clear - Noise reducing ear plugs

Enjoy 6 years of guarantee, stress-free!

Effi‐6 total guarantee

With the Effi-6 Guarantee, your hearing protection devices can be repeat manufactured, at no cost to you, in the event of:

  • A material defect
  • A lack of comfort
  • A protector inefficiency, as demonstrated by CAPA©

Learn more about the validation of the effectiveness

Maintaining your custom hearing protectors is simple.

Primo Excellium kit for your custom molded ear plugs


Waterproof and dustproof, Cotral's custom-made hearing protection noise reduction filters keep all their acoustic properties even in very dirty environments. They don't clog up. To preserve comfort and hygiene, it is essential to clean the outer surface of your hearing protectors. For this reason, the wipes ensure a quick daily maintenance.


With or without handle, with or without cord, your employees can adapt their molded earplugs to their operating habits and workstation. Working in the construction or metallurgy industry involves specific needs: a clip is also provided to limit losses, furthermore the handle is easy to hold.

For the food industry: an electromagnetic detection chip (incorporated in the earplug) and a fully detectable cord can be offered.

For work in shared offices or near workshops, a very flexible cord (combined with a Clear, discreet and not protuding noise reducing ear plug) allows frequent telephone calls while keeping the hearing protection in the ear.

Conveniently manage your customised hearing protection devices online

Your personal and secured online access to Cotral Lab's customer area makes it easier to manage your entire fleet of hearing protection devices from one central location. You can also access your previous orders and get in touch with our customer service.

The ear molds, once taken on-site, are digitally stored on our servers. This saves you time in case repeat manufacturing is required.

Customer area - Manage your hearing protection devices online

Frequently Asked Questions on hearing protection devices:

Hearing aids are instruments that amplify sound. They are used when people already suffer from hearing loss. Hearing protection devices, such as Cotral custom earplugs, on the other hand, are made to prevent hearing loss.

Qeos moulded ear plugs meet the main requirements of the food-processing industry: a detectable ball and cord can be offered as an option. For better visibility, Qeos earplugs are blue.

Your Hearing Prevention Specialist will select the filters and the hearing protection type, using the SAPAN method. After questioning the user, the application proposes a list of hearing protection devices that are suitable for each person, so that the employee is protected from noise without being isolated.

SNR is the acronym for Single Number Rating. It is the global index of impairment, a weighted average of impairment on all measured frequencies (63, 125, 250, 500, 1000, 2000, 4000, and 8000 Hz).

Cotral guarantees all its hearing protection devices for a period of 6 years. Beyond that, we advise you to take a new set of impressions or assess their real efficiency with a CAPA test.

You will benefit from a unique guarantee in the hearing protection device market: the Effi-6 Guarantee. It covers product manufacture, as well as comfort. Your hearing protection is offered with a money-back guarantee.

There are two types of filters, both of which reduce noise differently:

  • Flat response filters reduce sound without distorting it. Imagine being able to reduce the ambient volume, just as you do with your MP3 player or your Stereo system. These filters offer the same sound quality, with reduced volume. These hearing protection devices are equipped with filters that are recommended for technicians who must listen to the slightest malfunction, people who have to communicate in a noisy environment.
  • HFA (High Frequency Attenuation) filters soften noises on high frequencies. These filters are useful in very noisy industries: food-processing, metallurgy, construction industry, etc.

In cases where noise intensity limits have been exceeded, it is possible to increase noise reduction with double protection. This is composed of an intra-ear plug (standard or custom) and shell-shaped headband.

How is the noise reduction of double protection calculated?
The formula is as follows: 33 x log ((0.4 x reduction of intra) + (0.1 x reduction of ear muffs)) (Etude A. Damongeot et al.)
Example: A moulded earplug with an attenuation level of 32 dB and an ear muff with an attenuation level of 35 dB = 40 dB attenuation.

An Earmuff (Ear Defender) is not more efficient. If an employee is exposed to a noise level of 85 dB(A), equipping him with an Individual Noise Protector with an attenuation level of 30 dB would be a mistake. If workers are too isolated, they will not tolerate their hearing protection devices. Your employees will be tempted to remove them in order to listen to warning signals or communicate with one another. The EN-458 norm recommends a threshold level between 70 and 75 dB(A). The objective is to reduce the perceived noise levels under 75 dB(A).

The cost can vary, depending on several factors. The amount may seem to be higher when compared to standard disposable earplugs, but if you compare overall spending over 6 years, you will see that Cotral Lab's complete solution is more economical.

Cotral Lab's Hearing Conservation Technician comes to your site to take your employees’ ear impressions. This meeting enables an exchange of information on the risks related to noise and the usage of Cotral moulded earplugs. Cotral experts use the SAPAN method to determine which hearing protection device is most suitable for each employee, based on their specifics and the nature of their work. Everything is configured with respect to the functioning of your organisation.