With the headphones on humming search

Mr. Zenkel on humming search

Mr. Zenkel on humming search

Customers are calling building-biologist Oliver Zenkel whenever they hear very quiet sounds. The hum is imperceptible with normal hearing. Particularly disturbing is the monotonous and recurring frequency. The person concerned enters a feeling of helplessness. Mr. Zenkel has adjusted to the soft tones and plugged a headset to the sound level meter as technical reinforcement. How the search for the hum can succeed, describe the following examples.
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Avoid chronic insomnia

avoid chronic insomnia

Seepless at night

Sleep disorders are about twenty percent of the reason to ask a building biologist for advice. This resulted in a recent survey among colleagues of German Baubiologie Regional. Takes the insomnia for more than three months, experts speak of a chronic disorder. Sufferers should at least then seek medical advice. Accompanying the medical treatment the building biologist examines physical, chemical or microbial abnormalities at the sleeping place.
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Why this scientific study from the US worried

Mobile phone study from the US

Mobile phone study from the US

The results of cellular studies with rats are for those responsible for the US government department National Toxicology Program (NTP) apparently so explosive that they published partial results immediately. Reason for concern are two types of tumors that occurred only in the irradiated animals: malignant brain tumors (gliomas) and schwannoma of the heart. Furthermore, the researchers found an increased incidence of hyperplasia in the experimental animals. This extraordinary increase in the number of cells within a tissue is considered precancerous. Correspondingly high was the echo of the international press on the research results. However, not close at all commentators of NTP assessment. Rather, there is the usual downplaying associated with critical cellular studies.
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Highway bridge transmits humming

the highway bridge is the cause of the humming

the highway bridge is the cause of the humming

For months Roland Wernstein (Germany) examines an annoying buzzing sound in his neighborhood: the heating system, bass from the neighborhood, truck engines, vibrations caused by rail or air traffic were suspected, but were rejected. The end of March 2016 he took time for the facts check: the humming was heard only at night and when the wind from the southwest, recalled a distant diesel engine running and had short, miscellaneous long interruptions.
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If WiFi disrupts sleep

WiFi distubs sleep

Now the girl is sleeping well

Sometimes solutions can be quite simple. The parents turn the wireless router off at night and the two year-old daughter sleeping since then through again. The background: Susanna Rubin was with the nerves at the end. Her child woke up in the master bedroom at night nine to ten times screaming. If the family stayed away from home, there was no trouble sleeping. The building biologist initially investigated the area of the bed. There were a few little things to correct. For example, the low-frequency alternating electric fields could be eliminated almost entirely by turning off a circuit. For the electrostatic charging of the bed surface, there was also a solution. The main problem for the sleep was not to be found right in the bedroom.
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Avoid magnetic fields near the head

Expert measures with magnetometer

Expert measures with magnetometer

For investigation of sleeping areas, the main concern of the region is below the bed. In a particular case the building biologist found the problem not only on the ground, but primarily at the head of the sleeping quarters. What happened? Manfred Eberlein was not sleep at night after moving into a new apartment in the city center. In the old apartment he slept like a log. A dowser had already changed the roost some eight weeks before. However, this action was not successful.
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Energy-saving lighting and health

Example of a LED  light spectrum

Example of a LED light spectrum

A low power consumption is not the only criterion

Everyone wants to make an active contribution to climate protection and save energy. To achieve this goal, we can use energy saving devices and energy-saving bulbs in the household. But a low power consumption is not the only criterion when we select an appropriate lighting. Scientific studies have confirmed the importance of natural light to our health now detected. Daylight is optimal for our well-being. It has a harmonious color spectrum (red, green, blue) and a low UV component. The conventional light bulb came the natural color spectrum very close. Only the red component was somewhat increased. Even the light from halogen lamps largely corresponds to the natural spectrum. Another advantage of conventional light bulbs and halogen bulbs is a uniform flicker of 100 Hertz and a small proportion of flickering light.
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Wood preservation glaze as allergens suspected

 2-butanone oxime

2-butanone oxime

Sebastian Merkner went only reluctantly to his office. The self-employed carpenter completed Saturdays always his bills because he could then work undisturbed by the daily business. After a few hours in the room he was nervous and felt like charging. Then there were the headaches and eyestrain. The relationship between the office environment and the discomfort was obvious. Merkner went through the possibilities in his head: Was the beams of the wooden ceiling painted with wood preservatives? Escaped from the formaldehyde glued bookshelf? Was the mastic asphalt under the floor covering of the culprit? The master craftsman brooded for months after the causes of his symptoms.
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Reduce electromagnetic pollution in the office

reduce elektromagnetic fields at work

be vigilant against elektromagnetic fields at work

An employee of an engineering company complained for months about eye problems. In the Eye Clinic Robert M. was tested among other things, a sensitivity to electromagnetic fields. In fact, increased intraocular pressure, after a field source has been turned on in his surroundings. After this diagnosis, a building biologist made on the search for the problem. His order was: reduce electromagnetic pollution in the office.
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Do research carefully before painting a room

wooden floor

do research carefully before painting the room

Vincent Kuchler (Stuttgart/Germany) phoned our advice center yesterday. His eyes were swollen and his nose ran constantly. His suspicions focused on the oily stain on the newly installed floor in the bedroom and children’s room. A doctor for diagnosis of his symptoms he had not yet visited. Vincent wondered, however, why the other family members showed no allergic reactions. How could a piece of advice for those concerned to look like?
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