Frequently Asked Questions

What are Octave Bands and why are they used?

Octave Bands offer a filtering method of splitting the audible spectrum into smaller segments called octaves, allowing you to identify different noise levels across individual frequencies.

What is Ground Vibration?

Ground Vibration can be caused by construction, equipment or blasting, etc. Seismographs can be used to measure and record ground vibration. It is measured in terms of Peak Particle Velocity (PPV) and the units are mm/s. PPV refers to the movement within the ground of molecular particles and not surface movement.

What is Whole Body Vibration?

Whole Body Vibration is transmitted through the feet or seat of employees who drive machinery over rough and uneven surfaces as their jobs main role. The Law on Whole Body Vibration comes from Control of Vibration at Work Regulations 2005.

What is Hand Arm Vibration?

Hand Arm Vibration is transmitted into workers hands and arms through the use of hand-held power tools. The Law on Hand Arm Vibration comes from Control of Vibration at Work Regulations 2005. Health surveillance is a must for all of your employees who are likely be regularly exposed above the Exposure Action Value, despite your actions to control the risk.

What is Dose?

Dose is a measure of noise exposure measured as a percentage of the total allowable noise level according to noise legislation.

What is Leq?

Leq, or Equivalent Continuous Sound Pressure Level, is the constant noise level that would result in the same total sound energy being produced over a specific time period.

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