Tag Archives: protection

Wear earplugs for motorcycle riding

Source: https://www.osha.gov/SLTC/noisehearingconservation/index.html#loud Noise is measured in units of sound pressure levels called decibels, named after Alexander Graham Bell, using A-weighted sound levels (dBA). The A-weighted sound levels closely match the perception of loudness by the human ear. Decibels are measured … Continue reading

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Helmet building – 5

I used a grinder with metal cutting blade to clean up edges of the helmet. This is the grind setup how I smoothed surface of the helmet. I removed the chin section of the the helmet because it was too … Continue reading

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