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Noise and sounds

At B6 Akustik we offer noise suppression to many different industries and branches. Among other things, we can assist with acoustic improvements / noise reduction in:

  • Offices and premises in general
  • Production premises (including food producers)
  • Vehicles and cabs
  • Ships, including yacht cabins, and engine compartment
  • Various motors, generators, ventilation systems, pumps, etc.

What is noise?

In a publishing of a textbook in noise measurement, from the Danish noise measurement firm "Brüel og Kjær" there is a quite accurate quotation on the first page:

"Noise is an unavoidable part of life in our modern society. Technological progress has led to producing more and more noise from machinery, businesses, traffic, etc.
It is very important, that we make some effort in trying to change this, so that noise do not have to be necessary everywhere. But to do something about the noise requires a particularly knowhow about the origin of the noise, how it spreads, and how it is measured."

A summary of the above statement explains quite clearly, what the products produced from B6 Gruppen is all about!

Noise is not a thing that we need to accept – we can actually do something about it.

The key to success is very simple – we need knowledge about noise and sound, as well as a good experience in what to do in each situation.​

Where is the limit for noise?​

​The word “noise” covers the concept of unpleasant or unwanted sounds. When a sound irritates your ears, it is not only about the sound, but also about our attitude to the sound.

If we are having a party or just in a good mood - loud music is a good experience, but the day after when the neighbours are making noises, the same music is suddenly an annoying noise, because our attitude towards it is different. 

If a sound is perceived as noise or not, is not only about how amplitude the sound is. A dripping tap or a scratch in a record can easily be more annoying than a thunderclap. Sound and noise are therefore two different things. A sound can so to speak be experienced as a pleasant ting, or as plain noise - depending on the context in which it is included.

​It is quite individual who develops hearing damage, but an average evaluation is concluding the following:

(a) An 80 dB load in 10 years, average 8 hours a day, there is very little probability of getting a hearing damage.

(b) An 82 dB load in 10 years, 1% to 2% will have a hearing damage – and this have nothing to do with age.

(c) An 85 dB load in 10 years, approximately 4% will have a hearing damage, again which has nothing to do with age.

(d) On a 90 dB load, approximately 11% will have a hearing damage, again which has nothing to do with age.

The risk of losing some hearing abilities is very possible. The risk of getting tinnitus combined with a hearing damage is maybe less. Nevertheless, this suffering can very easily be debilitating and have far reaching consequences for both work and private life.

What is sound?

The word Acoustics is a branch of physics and the study of sound and waves in gases, liquids and solids.

Sound is a pressure of variations in, for example, air (or water). Pressure variation exerts through the air as sound waves and when they affect the eardrum in the human ear, it starts to vibrate.

The vibrations will through the middle ear and in the inner ear - be transformed into nerve impulses that the brain perceives as sound.​

The ear can perceive a very big sound scale - from the sound of a tiny pin falling to the ground, up to the noise from a jet plane.

The sound is perceived as deep or high, depending on how many times the pressure varies per minute. That is what we also call frequency and frequency is measured in Hertz.

An average young person can hear frequencies between 20 Hz and 20,000 Hz.

Sound strength corresponds to sound pressure. Quite literally, the pressure the eardrum is exposed to when the sound hit the ear.

To describe the sound strength we often use the decibel scale.

The Decibel scale is from 0 dB, which is the limit for audible hearing, up to 140 dB, where the sound pressure becomes so strong that it becomes truly painful.

The Decibel scale shall contain all of these sound pressure levels, and therefore it has been necessary to make a particular subdivision.

When you go up or down in the scale, it is always a 3 dB doubling or halving of the sound.

This means that twice the 80 dB is not 160 dB, but 83 dB.

If you measure the level of a kindergarten, it is very important to know if the measurement was 80 or 83 dB. At the same time, reducing the load of 3 dB will have a very important effect for the working environment.

​​

What is a sound wave?

A sound wave is defined by the speed, amplitude and frequency.

The sound speed depends strongly on the media through which it moves, but also by the temperature. Sound speed is approx. 340 m/s in air - and 1500 m/s in water.

The Wavelength is equal to the distance between two peaks of a wave. Sound wavelength, λ is related to the sound speed c and its frequency f by the formula:

λ = c/f

λ = wavelength of the sound,

c = speed of the sound

f = frequency of the sound 

Source:

Interpretation of texts and quotes by Brüel & Kjær: Grundbog i Lydmåling, Uffe Jørgensen, 1987

Why choose us?

B6 Akustik has over 40 years of experience in producing acoustic materials and noise reduction solutions, and guiding customers in their use. B6 has a very large network of competent subcontractors, and can provide next to all imaginable acoustic materials.

  • B6 Akustik offers products from our own Danish factory, with over 40 years of experience in production and consulting.
  • B6 Akustik performs all cutting and lamination processes in-house.
  • B6 Akustik offer cutting acoustic items according to customer's CAD drawings (e.g. by water jet).
  • B6 Akustik offers maximum 15 working days delivery time.
  • B6 Akustik offers advice and preparation of samples so that the best decision-making basis and material selection can be found.
  • B6 Akustik offers ABSOLUTELY competitive prices.

Contact us

​B6 Akustik A/S  -  CVR: 62124814

+45 99 89 10 50  -  email@b6akustik.dk

Tranåsvej 5-7, DK-9300 Sæby

B6 A/S  -  CVR: 14020136

+45 99 89 10 00  -  b6@b6.dk

Tranåsvej 33, DK-9300 Sæby

B6 Slovakia s.r.o. - ICO: 35 810 742

+421 47 433 07 66 - b6@b6.sk

Gemerska Cesta 1, SK-98401 Lucenec

Our company is credit worthy according to Bisnode's credit assessment system that is based on a number of decision rules. This credit rating is updated on a daily basis, and always shows the current rating and date.
Our company is credit worthy according to Bisnode's credit assessment system that is based on a number of decision rules. This credit rating is updated on a daily basis, and always shows the current rating and date.