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Noise exposure during pregnancy and hearing in children

Study

© Emily Cahal - sxc.hu

A new cohort study has shown that noise exposure during pregnancy can damage the unborn child’s hearing, with an 80% increased risk in noisy occupational environments.

Until recently, it was assumed that unborn children where shielded from noise in the womb but it has been demonstrated that loud noise does in fact reach the fetus. The study carried out by the Institute of Environmental Medicine (IMM) at Karolinska Institutet, Stockholm, Sweden provides new evidence that women should avoid exposure to high levels of noise while they are pregnant.

The study, to be published in the journal Environmental Health Perspectives, included a cohort of over 1.4 million children born in Sweden between 1986 and 2008. Data collected included their mother’s occupation, smoking habits, age, ethnicity, body mass index, leave of absence, and socio-economic factors. Results showed that for the group of part-time and full-time workers, the adjusted hazard ratio (HR) for hearing dysfunction associated with maternal occupational noise exposure greater than 85 dB versus less than 75 dB was 1.27 (95% CI). For full-time workers as a group, the HR was 1.82 (95% CI).

“The Swedish Work Environment Authority recommendation is that pregnant women should avoid noise levels of over 80 dBA, but unfortunately this recommendation is not always followed,” says Jenny Selander, lead author for the study. “Our study shows how imperative it is for employers to observe this recommendation. Even if pregnant women themselves use ear protectors in noisy environments, the babies they’re carrying remain unprotected.”

Source: Karolinska Institutet; Selander J, et al. Maternal Occupational Exposure to Noise during Pregnancy and Hearing Dysfunction in Children: A Nationwide Prospective Cohort Study in Sweden. Environmental Health Perspectives 2015 Dec 8.

C.S.

Cognitive hearing aids to filter out noise
Cognitive hearing aids to filter out noise

© Itestro

Future trends

Researchers from Columbia University School of Engineering and Applied Science, New York (USA), have used deep neural network models to study auditory attention decoding methods and have come closer to making cognitively controlled hearing aids a reality.

Dentists suffer long-term hearing problems in high frequencies
Dentists suffer long-term hearing problems in high frequencies

Working conditions

Carlos Gejo and Sylvester Feijoo (Photo: Otometrics).

Dental professionals suffer long-term hearing problems, according to a thesis sponsored by Otometrics on "Hearing loss in dentists"

20th Oticon Audiology Summer Camp
20th Oticon Audiology Summer Camp

Training

This year, the Oticon Audiology Summer Camp celebrates 20 years of providing graduate students in audiology with a unique opportunity to gain relevant, practical professional world knowledge and insights.

Bone conduction devices market expected to grow
Bone conduction devices market expected to grow

© Andrés Rodriguez

BAHS

RnR Market Research has released a new market research and competitive analysis report on the global bone conduction devices market which it reports is expected to grow at an annual rate of 14.23%.

Dr. Héctor Ruiz: “Implant indications on the increase”
Dr. Héctor Ruiz: “Implant indications on the increase”

Associations

"Undoubtedly, one of the best ever fusions has been that of hearing aid technology with implants, because they complement each other" © K.H.M.

Cochlear implants have made a tremendous contribution since they were brought in for the only sense-related organ that can be replaced. This has proved a major revolution.

In vivo manipulation of inner ear gene expression in mice
In vivo manipulation of inner ear gene expression in mice

C. Luchschen

Genetics

An international team of researchers from several institutes and universities, led by a group at the Venetian Institute of Molecular Medicine, Foundation for Advanced Biomedical Research in Padua, Italy, recently published findings of their study to control gene expression in mice in vivo using viral vectors.

Company Directory

New products

VANISH brings new color blending process to BTE or RICVANISH brings new color blending process to BTE or RIC

Every behind-the-ear hearing aid manufactured in the world today has a bright and shiny plastic hearing aid tube.  [ ... ]

Oticon Opn upgraded with customizable tinnitus supportOticon Opn upgraded with customizable tinnitus support

© Oticon Opn

With the launch of Tinnitus SoundSupport™ Oticon has announced a significant upgrade to the Oticon Opn family. [ ... ]

New EXPRESSfit® Pro Fine-tunes Fittings on Sonic SoundDNA PlatformNew EXPRESSfit® Pro Fine-tunes Fittings on Sonic SoundDNA Platform

New EXPRESSfit® Pro is an easy-to-use, robust system with all the tools needed to fine-tune settings on the Sonic SoundDNA platform.  [ ... ]