PLACID Instruments Products

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    Hemisphere kit for SoundPower measurements ISO3744, ISO3745

    PLACID HS10 / HS20
    Frequency range: 3.15 Hz to 20 kHz
    Dynamic range: 17 dB to 139 dB
    Sensitivity: 50 mV/Pa
    Measures incl. feet: Diagonal 1500 mm
    # of Microphones: 10 or 20 1/2″ microphones
    PLACID HS10 – HS20, the hemisphere will hold either 10 or 20 microphones according to the relevant used standards. Easy assembly and packing.

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    Impedance tube, Kundt’s tube, absorption and transmission loss

    The impedance tube (also know as Kundt Tube) measurement obtains the normal incidence absorption coefficient of a layer of textiles with a small diameter (usually less than 10 cm).

    The results can be used to compare the basic absorption performance of the material and for acoustics simulations.

    In practice, the absorbers can be quite large and their structure and configuration may be complex and part of acoustic designs. Furthermore, they will be exposed to real sound fields where the incident sound may come from many directions.


    The diameter of the impedance tube, 30 and 100 mm to cover the whole frequency range.

    PI8810, 100 mm impedance tube, frequency range 63 Hz – 1600 Hz

    PI8803, 30 mm impedance tube, frequency range 800 – 6300 Hz

    Impedance tube can measure sound absorption coefficient as well as transmission loss, ISO10543-2

    Microphones used: 1/4″ Class 1, 20 Hz to 20 kHz (BNC to SMB connector)


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    Measurement microphone cartridges for Soundlevel meters & IPE

    Placid PMP20 Class 1 microphone

    PMP20, Class 1 microphone, 0 Volt polarization voltage, free field, 20 Hz – 40 kHz

    Model: PMP20

    Diameter: 1/2″

    Standard (IEC61672): Class 1

    Measuring method: Free field

    Frequency response: 20 – 40 kHz

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    Measurement microphone sets

    The measurement microphone sets have been combined so they fulfil our users’ typical measurement needs. Independently of your measurement system and application you should be able to find a set that suits your needs. The microphone sets can be connected directly to all professional measurement systems and as indicated they are available for both CCP and 7-pin LEMO inputs.

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    Sound Calibrator for Soundlevel Meters

    Calibrator for sound level meters, 1 kHz, levels 94 dB and 104 dB. Can be used for any sound level meter with a 1/2″ microphone.

    PLACID CA-02 calibrator features:

    • sound calibrator with 2 levels, 94 dB and 104 dB at 1 kHz
    • Accurate and very easy to use
    • can be used for calibration of 1/2″ and 1/1″ microphones
    • low battery indicator
    • complies with IEC60942: 2003, Class 2
    • complies with ANSI S1.40

    PLACID CA-02 calibrator specifications:

    • Output Sound Pressure Levels: 114dB and 94dB re 20 uPa under reference Conditions
    • Output Frequency: 1000Hz ±2%
    • Total Harmonic Distortion: < 4%
    • Reference Conditions:
      Temperature 23℃(73℉)
      Static press 103hpa
      Relative humidity 50%
    • Accuracy of sound pressure level:
      Understated reference environment conditions ±0.5dB
    • Battery test:
      Operate: Green LED indicator
      Low battery: Red LED indicator
    • Battery: 9 Volt battery
    • Dimensions: 115 x 65 x 45 mm
    • Weight: Approximately 170g
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