Right to Quiet Society Noiseletter
Fall 2015, page 5

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Daimler's Noise Monster

By Mads Danner

Smart Forgigs: revamped mini-car with high-end sound system and 5,720 Watt

Not to be missed: concept vehicle Smart Forgigs rolls around with five amplifiers for Daimler ©

For mobile uses at live concerts: Daimler, together with audio expert JBL, has put a rolling amplifier on the basis of a Smart Fortwo on wheels, with a 5,720 watt capacity and a sound pressure of up to 150dB.

Sound intensity instead of size! The prototype Smart Forgigs with the high-end sound system installed and turned on would likely not pass by anyone unnoticed. As many as five amplifiers in the revamped mini-car produce an enormous noise level, three for the high and middle pitched sounds, two for the subwoofer. The total of 16 speakers are supported by two basses with 30cm diameter each. The speakers are not only situated in the trunk of the tiny city-dasher but also on the dashboard and the doors. Now what for all of this?

Sound tempest and ambience illumination

The idea behind the joint project of Daimler and JBL: the Smart Forgigs as a mobile amplifier could "transmit" live concerts and be interesting to buskers, for instance, who could gain attention with this high-end sound system. In addition to the acoustic properties, musicians or DJs as well could bring colour to the play via a manoeuvrable ambience illumination in and outdoors, thus to animate the crowds.

The 100 m electric speaker and signal cables used for the installation are completely hidden behind the panelling, to avoid a pellmel. To keep the tempest somewhat tamed, there are 10 square metres of sound-proofing material to insulate the driver's space and door panels.

The Smart Forgigs is still an unavailable prototype that will go to tour for demonstrations. But who knows, may be this rolling sound system will soon officially be at your dealer's lot.

website link to article

Road traffic and railway noise exposures and adiposity in adults:
A cross-sectional analysis of the Danish diet, cancer, and health cohort

Jeppe Schultz Christensen1, Ole Raaschou-Nielsen1, Anne Tjønneland1, Kim Overvad2,3, Rikke B. Nordsborg1, Matthias Ketzel4, Thorkild IA Sørensen5, and Mette Sørensen1

Author affiliations open

(1) Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark; (2) Department of Public Health, Section for Epidemiology, Aarhus University, Aarhus, Denmark; (3) Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark; (4) Department of Environmental Science, Aarhus University, Roskilde, Denmark; (5) Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Institute of Preventive Medicine, Bispebjerg and Frederiksberg Hospitals, The Capital Region, Copenhagen, Denmark and MRC Integrative Epidemiology Unit, Bristol University, Bristol, U.K. PDF Version (490 KB)

Abstract about this article supplemental material

Background: Traffic noise has been associated with car-diovascular and metabolic disorders. Potential modes of action are through stress and sleep disturbance, which may lead to endocrine dysregulation and overweight.

Objectives: We aimed to investigate the relationship bet-ween residential traffic and railway noise and adiposity.

Methods: In this cross-sectional study of 57,053 middle-aged people height, weight, waist circumference and bio-electrical impedance were measured at enrolment (1993-1997). Body mass index (BMI), body fat mass index (BFMI) and lean body mass index (LBMI) were calculated.

Residential exposure to road and railway traffic noise ex-posure was calculated using the Nordic prediction method. Associations between traffic noise and anthropometric measures at enrolment were analysed using general linear models and logistic regression adjusted for demographic and lifestyle factors.

Results: Linear regression models adjusted for age, sex and socioeconomic factors showed that five year mean road traffic noise exposure preceding enrolment was associated with a 0.35cm wider waist circumference (95% CI: 0.21, 0.50) and a 0.18 points higher BMI (95% CI: 0.12, 0.23) per 10dB. Small, significant increases were also found for BFMI and LBMI. All associations followed linear exposure-response relationships. Exposure to railway noise was not linearly associated with adiposity measures. However, exposure above 60 dB was associated with a 0.71cm wider waist circumference (95% CI: 0.23, 1.19) and a 0.19 point higher BMI (95% CI: 0.0072, 0.37) compared to unexposed (0-20dB).

Conclusions: The present study finds positive associations between residential exposure to road traffic and railway noise and adiposity.

This Environmental Health Perspectives (EHP) Advance Publication article has been peer-reviewed, revised, and accepted for publication. EHP Advance Publication articles are completely citable using the DOI number assigned to the article. This document will be replaced with the copy-edited and formatted version as soon as it is available. Through the DOI number used in the citation, you will be able to access this document at each stage of the publication process.

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