The Noise Center

Hear for the Future® The Center for Hearing and Communication is proud to offer the Noise Center as a public service for people seeking information about the dangers of noise exposure and the steps they can take to promote a safer and quieter world. Exposure to noise is the leading cause of hearing loss—not age.

Common environmental noise levels

How loud is too loud? Continued exposure to noise above 85 dBA (adjusted decibels) over time will cause hearing loss. The volume (dBA) and the length of exposure to the sound will tell you how harmful the noise is. In general, the louder the noise, the less time required before hearing loss will occur. According

The impact of noise on childhood cognitive development

Poor classroom acoustics: The invisible reason Johnny can’t read. Poor classroom acoustics create a negative learning environment for many students, especially those with hearing or learning difficulties. According to a report by David Lubman (“America’s Need for Standards and Guidelines to Ensure Satisfactory Classroom Acoustics”) “acoustical conditions in many classrooms are unsuitable for such tasks

Congressional Quiet Skies Caucus Letter To FAA Administrator Steve Dickson re DNL65

Currently, FAA law has extremely complicated rules for establishing a noise boundary around airports. (A noise boundary is a geographic area inside which there is a certain acceptable noise level.) This is referred to as the DNL65. and it has several major flaws. The FAA Reauthorization Act Of 2018 attempted to address these flaws in several ways. This letter, from a caucus of Congressmen engaged on airport community issues complains to the Administrator that the spirit of the law is not being adhered to and demands that he make attempts to put his agency into compliance.

The language is fairly technical, however there are a couple of basic points they raise: First, that the noise boundary be determined by actual noise measurements (currently the noise boundaries are ‘modeled’ and those calculations often do not reflect in any way the lived experience for residents.) Second, that the ‘acceptable’ noise level of sixty five decibels (hence DNL65) has been determined to be far too high to conform with current understandings of healthy living.

A neurobiological mechanism linking transportation noise to cardiovascular disease in humans

Michael T Osborne, Azar Radfar, Malek Z O Hassan, Shady Abohashem, Blake Oberfeld, Tomas Patrich, Brian Tung, Ying Wang, Amorina Ishai, James A Scott … Show more European Heart Journal, Volume 41, Issue 6, 7 February 2020, Pages 772–782, Published: 26 November 2019 Article history Views Cite Permissions Icon Permissions Share Abstract Aims Chronic

FQUROH: A Flight Demonstration Project for Airframe Noise Reduction Technology

FQUROH: A Flight Demonstration Project for Airframe Noise Reduction Technology – YouTube To make future aircraft quieter, JAXA has been developing airframe noise reduction technologies. The footage introduces JAXA’s FQUROH flight demonstration project for airframe noise reduction technology. (March 2018) (FQUROH stands for the “Flight Demonstration of Quiet Technology to Reduce Noise from High-lift Configurations”)

Larson Davis 831 Manual

This is the hardware used for each of the 24 permanent noise monitors around Sea-Tac Airport. The significance for us ‘civilans’ is that it uses open-source standards for storing data. Which means that the public can (and should) have access to its recordings. That would enable us to audit the reports we get from the