What is this BS EN 61094-3 - Measurement microphones about ?
BS EN 61094-3 discusses electroacoustics with a focus on measurement microphones as a safety standard on the primary method for free-field calibration of laboratory standard microphones by the reciprocity technique.
BS EN 61094-3 is the third part of the BS EN 61094 multi-series on measurement microphones that are intended for use by laboratories with highly experienced staff and specialized equipment.
BS EN 61094-3 specifies a primary method of determining the complex free-field sensitivity of laboratory standard microphones so as to establish a reproducible and accurate basis for the measurement of sound pressure under free-field conditions. BS EN 61094-3 applies to laboratory standard microphones meeting the requirements of IEC 610941.
Who is BS EN 61094-3 - Measurement microphones for ?
BS EN 61094-3 on measurement microphones is useful for:
- Manufacturers of measurement microphones
- Testing authorities
- Sound-field personnel
- Testing laboratories
Why should you use BS EN 61094-3 - Measurement microphones ?
Measurement microphones are pressure microphones that ideally have an omnidirectional pick-up pattern. BS EN 61094-3 provides a method of determining the complex free-field sensitivity of laboratory standard microphones so as to establish a reproducible and accurate basis for the measurement of sound pressure under free-field conditions.
Overall, BS EN 61094-3 is useful as it helps in determining the pressure sensitivity level of working standard microphones.
What’s changed since the last update?
BS EN 61094-3:2016 supersedes BS EN 61094-3:1995 which is withdrawn. BS EN 61094-3:2016 includes some technical changes with respect to BS EN 61094-3:1995.
These include:
- A new informative annex describing the use of time-selective techniques to minimize the influence of acoustic reflections from the measurement setup
- Provision for the calibration of microphones in driven shield configuration
