Acoustic calibrators

• Pressure calibration at all third-octave centre frequencies 63 Hz - 8 kHz in half-inch configuration, levels 80 - 130 dB
• Certification of distortion levels, timing facilities and a.c. output voltage levels
• Prices from £75

Sound level meters, personal sound exposure meters

• Selected tests based on IEC 61672-1:2002, IEC 61651:1979 and IEC 60804:1985 for sound level meters, IEC 61252:1993 for sound exposure meters
• Testing of integral octave and third-octave band filters
• Testing of computer based systems as well as hand-held meters.
• Prices from £185

Microphones

• Frequency response using electrostatic actuator, with free-field equivalent response using manufacturers' data
• Visual inspection & cleaning of diaphragms; self-noise check
• Sensitivity at 1 kHz in half- and quarter-inch configuration
• Prices from £60

Filter sets

• Testing of octave and third-octave band filters to IEC 61260 or IEC 225, as appropriate, over frequency range 10 Hz - 25 kHz
• Other filter shapes and combinations by arrangement
• Prices from £135

Reverberation time measurement.

• Verification of Reverberation Time measurements from T60 = 0.02 to 25 seconds. Standard package measures all third octave bands 50 – 10kHz, for both T20 and T30 if fitted, at target decay times of 0.2, 0.5, 1.0, 3.0 and 10.0 seconds. Other options available on request.
• Prices from £180

Tapping Machine checks

• Verification of Tapping Machines in support of BS EN ISO140-7:1998.
• Full test £365
• Pre-test £75

The pre-test charge will be made only if the machine fails initial checks and, after consultation with the client, no further testing is carried out.

Noise Recording Systems

• Tests of dynamic range, linearity and frequency response for sound level meters fitted with record options, either replayed to the same meter or to an external analogue system.
• Tests of frequency response and dynamic range of recording instruments, e.g. DAT recorders
• Tests of recording systems either with a sound level meter or just a signal processing system.System may include a microphone which can also be fully checked if required
• Prices from £85

Prices exclude VAT & return carriage