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Influences of weather, damage and ageing on the performance of outdoor microphone windshields

Windshields fitted to outdoor measuring microphones serve a dual purpose – to reduce wind-generated noise, and to protect the delicate microphone from damage by environmental factors such as rain, ice and dust. However, the presence of a windshield inevitably affects the directional and frequency responses of the measuring system. This paper presents results of measurements on the directional and frequency Read More…

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Noise Induced Hearing Loss – An Introduction

There are over an estimated 9 million hard of hearing individuals in the UK (source: Action On Hearing Loss (RNID), 2005 survey). The overwhelming reasons for hearing loss are listed as being age-related and noise-related, very much in-line with other Western world countries. The big difference is that while age-related hearing loss is a natural process that we can do Read More…

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Why do instrument standards have different dates?

I’ve been asked recently to confirm if a sound level meter is marked as meeting IEC 61672-1:2002, does it also meet BS EN 61672-1:2003? Instruments such as sound level meters are designed to meet certain standards and these are published by a range of International, Regional and National standards organisations. In the case of sound level meters, the standards that Read More…

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Why do I need to calibrate my noise measurement instruments? Part 1 of 6

If you are using your noise measurement instrument to meet any Standards, Regulations or Guidelines  it is essential that your equipment is measuring accurately. If you are working to the Noise at Work Regulations 2005, or any ISO or BS EN standard that requires the use of noise measurement equipment, the standards to which the equipment must comply will be Read More…

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DIN EN 15947-4

Prüfverfahren für pyrotechnische Gegestände DIN EN 15947-4:2010 seit Dezember in Kraft Die Einhaltung der DIN EN 15947-4 zur Prüfung von pyrotechnischen Gegenständen wird aktuell schärfer Kontrolliert. In dieser 40-seitigen Norm ist das Prüfverfahren für Feuerwerkskörper Kategorien 1, 2 und 3 beschreieben. Expand your Noise Knowledge!Signup to the NoiseNews blog for the latest article updates straight to your inbox. Email Send Read More…