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Monthly Archives: April 2016

The Effect of Earplugs in Preventing Hearing Loss From Recreational Noise Exposure (A Systematic Review)

This is an interesting review of a study of how effective ear plugs are in the workplace. We take for granted that people working in loud factories wear protective hearing, but many of the clubs, pubs, concerts and festivals that have as equal levels of sound. As they say below, it isn’t mandatory to wear ear plugs in such environments, which defies common sense and possibly causes more damage than we understand. Here you can find the original source of the review.

A review of the literature turned up only two high quality studies that looked at whether wearing earplugs to music venues will prevent hearing loss and tinnitus directly afterward.

Dr. Wilko Grolman and colleagues at University Medical Center Utrecht in The Netherlands searched for published studies containing the keywords “music” and “earplugs” and screened 228 resulting papers. All but four were not eligible for inclusion in the review and only two were highly relevant and did not have a high risk of bias, in the reviewers’ estimation.

Two studies simply examined people who chose on their own to wear or not wear earplugs, while two randomized controlled trials tested what happened when participants were assigned to wear earplugs or not.

Two studies reported on hearing loss and tinnitus while one only reported hearing loss.

The two best studies were different enough that the researchers couldn’t combine their data and analyze the results, the reviewers wrote. Both included 29 concert attendees and performed audiometry before and after the concerts. In one study, participants were allowed to choose whether or not they wore earplugs, and only three chose to wear them.

“Frankly, with such a small comparator group between three subjects and the others, it would be hard to assess validity of plugs or not,” said Dr. Jennifer Derebery, president of the Los Angeles Society of Otolaryngology and lead author of the first study.

“We had trained them all in proper insertion, and encouraged but not required wearing them,” Derebery told Reuters Health by email.

In the other study, 15 participants were assigned to the earplug group.

In general, wearing earplugs did reduce hearing loss directly after the concerts, but did not eliminate it completely, as reported online March 3 in JAMA Otolaryngology-Head and Neck Surgery.

“Ear plugs are effective in preventing hearing loss when they are used both correctly and consistently,” said Colleen G. Le Prell, the Emilie and Phil Schepps Professor of Hearing Science at the University of Texas at Dallas, who was not involved in the review.

“This systematic review highlights the very limited data on prevention of recreational music-induced hearing loss using earplugs,” Le Prell told Reuters Health by email.

“At younger ages, loud toys, firecrackers, loud video games, personal stereos or personal music players, lawnmowers or leaf blowers, sporting events or air shows, or other non-music events might be more likely noisy activities than music venue attendance,” Le Prell said. “A significant number of youth are also involved in target shooting activities, which children can get involved with through Boy Scouts or other organizations.”

For teens and young adults, repeat exposures to amplified music at clubs, concerts, festivals, or other related events may damage the inner ear and result in hearing loss, she said.

“Most concerts are both loud enough, and long enough, that they are likely to exceed the total daily exposure allowed by workplace safety regulations,” she said. “Sound exposure also commonly occurs via loud music delivered via personal listening devices, at sporting or other recreational events, and at jobs that involve lawn-mowing, use of power tools, or construction services.”

For workplace noise exposure, “we are not doing a very good job achieving correct and consistent use of hearing protection devices (HPD), including both ear plugs and ear muffs,” she said.

“In the United States, it is relatively uncommon for music venues to provide ear plugs at no charge,” Le Prell said. Even if they were provided, people may need to be educated in why using them is important and in how to use them correctly, she said.

“As a neurotologist, it really is upsetting to see these kids coming in younger and younger with a completely preventable hearing loss,” Derebery said.

The Sepura Group to Provide Communications for the Olympic Games

It’s a brave move by the olympic organisers, the London Olympic communications was run by Riedel and they did an excellent job, they have experience in this field, but the Brazilians are obviously set on using Teltronic and we all hope that they do just as good as a job.

Teltronic, part of the Sepura Group, has been chosen by the public security secretary of Río de Janeiro State in Brazil to supply communications for the Summer Olympics and Paralympics, informally known as Rio 2016.

The €10m contract will cover four venues (Barra da Tijuca, Copacabana, Deodoro and Maracanã), two airports (Rio de Janeiro/Galeão – Antônio Carlos Jobim International and Santos Dumont) and several key transport routes in the Olympic area.

The agreement with Teltronic will see an extension to the traffic capabilities of the existing Teltronic network currently used by the Rio police, as well as the installation of further Nebula base stations to provide additional coverage for the state police and emergency services, and the Olympics organisation workforce.

The existing network was originally provided by Teltronic for the Pan American Games in 2007 and, after some upgrades, is now supporting over 100 dispatch operators and more than 18,000 radios. This new upgrade for the Olympics will feature two extra TETRA carriers for each site, to update the capacity of the existing network; base stations with up to 12 TETRA transceivers to support high traffic loads throughout the event; a CeCoCo Control Centre, to accommodate a further 50 dispatch operators; an additional 6,000 terminals featuring Teltronic’s Synchronous Data Manager application to pare down the GPS refresh time in AVL applications; and 24/7 maintenance and operational support during the Games.

“This win builds on our long-term relationship with the Brazilian authorities and public safety agencies,” said Paulo Ferrao, the Sepura Group’s sales director for Brazil.

“We have a strong background in events of this scale, having supported communications for the FIFA World Cup 2014 and the Pan-American Games, both huge events in the sporting calendar of Brazil and, indeed, the world. We are delighted that Rio de Janeiro’s public safety agencies have, once again, placed their trust in us.”

Superintendent of critical communications at the Security Secretariat of the State, Colonel Alexandre Corval, commented: “We are extremely happy to have chosen Teltronic.

“The company has been a trustworthy partner to our public safety agencies for over ten years. Once again, they have exceeded our expectations in terms of technical development, quality of the deployment and, above all, their dedication to customer service: throughout the project, they have paid close attention to our technical and operational requirements.

“We are confident that this extension to the existing Teltronic TETRA system will optimise our mission-critical communications, enhancing the security of both visitors and employees throughout Rio 2016.”

Source- http://www.railway-technology.com/contractors/signal/sepura/pressolympic-sepura-brazil.html

Motorola completes £700 million acquisition of UK emergency comms provider Airwave

Motorola has completed its acquisition of Airwave, the former provider of the mobile communications network for UK emergency services.

The acquisition was completed on a debt-free basis with a net cash payment of around £700 million, with a deferred cash payment of £64 million to be made in November 2018.

Motorola expects the acquisition to immediately contribute to non-GAAP earnings and free cash flow.

Airwave is headquartered in Berkshire, England, and employs roughly 600 people. It is owned by a fund of Australia’s Macquarie Group.

In late 2015, Airwave filed a legal challenge to the Home Office after EE became the preferred supplier to provide a 4G network to the UK emergency services. Motorola is the preferred bidder for user services to the emergency services.

Airwave complained about the procurement process and the inability of the cellular network to handle the traffic. Currently these services are provided through Airwave’s own terrestrial trunked radio, or Tetra network, which will cease to be a component of police radios.

The decision to move from Tetra has been criticised by some, including members of the Tetra + Critical Communications Association.

Advocates of moving to 4G cite alleged failures of the network during the 2011 riots.

“The acquisition of Airwave enables us to significantly grow our managed and support services business and reflects our commitment to the public safety users in Great Britain,” said Greg Brown, chairman and CEO of Motorola Solutions.

“The combination of our years of experience as a trusted global leader in mission-critical communications and Airwave’s proven service delivery platform will provide Great Britain with innovative emergency services technology that enhances public safety today and into the future.”

This has been in the news for a while and it is a really smart move by Motorola, they have purchased the company that run all the communications for all the UK’s emergency services (tetra network) and manage all of the infrastructure along with that, so with the up-coming contract renewal and many of the phone companies sniffing around looking to capitalise, Motorola have shored up their position with this acquisition. We found this article here, where you can find a lot more on the story throughout the site.

Innovative radio solution protects and preserves Chinese forests

We all know how important radio communications are, and Motorola Solutions have captured a massive coup by providing the radios for protecting the Chinese forests, a feather in the cap for Motorola because Hytera, their biggest competitor at the moment, originating from china, interesting! We found this article on this website.

Motorola Solutions (NYSE:MSI) with its channel partner Beijing Dyne Rcomm Technology are helping to keep China’s Hunan forestry region safe with a MOTOTRBO digital radio system that increases safety and security for employees while helping them to work more efficiently.

China’s Hunan province is rich in flora and fauna resources that are essential to the region’s economy. However, these vast areas which make up around 60 percent of the province’s total surface area can be risky places to work for forest rangers. Forest workers depend on reliable communications to be aware of potential bushfire risks and other emergencies.

The innovative radio system integrates MOTOTRBO digital two-way radios and repeaters, a dispatch console for centralised control and monitoring of the network at all times and Motorola Solutions’ IP Site Connect digital solution to extend radio network coverage over the internet throughout the counties and cities.

“Rangers depend on access to clear and reliable communications. They need to stay constantly connected to their colleagues working in control rooms who have visibility of the entire operation and can help to keep them safe at all times,” said Michael Jiang, China President and Country Manager, Motorola Solutions.

“It’s absolutely essential for forest rangers to know where their co-workers and resources are at all times, especially in times of emergency.

“Hunan’s new radio network provides extensive coverage throughout the region, enabling rangers working across a wide geographic area to report the very first signs of fire so that resources can be deployed quickly and effectively to protect lives and natural resources,” Mr Jiang said.

Hunan’s integrated system connects the surrounding cities and counties through clear voice communications enhanced with noise cancelling features that perform reliably in the nosiest environments. This system also supports data transfer across the radio network, using GPS to pinpoint the location of nearby team members and resources in emergency situations, while text messages and automatic alerts can be sent between the province’s central control room and radio users in the field.

Motorola Solutions has now deployed more than 5,000 radios to major forestry projects across greater China at locations including the Inner Mongolia, Hebei, Liaoning, Sichuan and Guangdong provinces.