The Zircon is a loudspeaker-microphone probe for measuring in situ the absorption and reflection properties of surfaces. These may be indoor surfaces, such as in concert halls and gyms, or outdoor surfaces, such as road surfaces (ISO 13472-1), sound barriers installed in a free field (NF S 31-089) and traffic noise reducing devices (CEN/TS 1793-5).
Using the wall measurement stand, the Zircon can be rotated horizontally and vertically, and is provided with 10° step angle indications. When using the floor measurement stand, the Zircon can be rotated vertically over 360°.
The Zircon components are easy to dismantle and transport in their flight cases.
For wall measurements, a setup including the Zircon Probe and the Zircon W-stand is used.
The Zircon is connected to an analyzer such as Dirac running on a notebook PC, with integrated sound device or external sound device such as the Triton, and using a power amplifier, such as the B&K Type 2734.
The analyzer generates an excitation signal, such as an MLS or sweep signal, which is fed to the loudspeaker. The microphone picks up the direct and reflected sound. From the sent and received signals, the analyzer calculates the impulse response. From the impulse response, a direct and a reflection part are extracted by windowing, subtraction and other techniques. By comparing these signal parts, the absorption and reflection properties of the surface under test are obtained.
The low end of the usable frequency range is determined by the (limited) length of the time windows. The direct sound time window cannot be made so long as to overlap the reflected response, whereas the reflected sound time window is limited by the tail of the direct response, and the parasitic reflections. Both windows can be extended by using the subtraction technique as described by E. Mommertz in 'Angle-dependent in-situ measurements of reflection coefficients using a subtraction technique' (Applied Acoustics, Vol.46, 1995, pp. 251-263).
For floor (e.g. road surface) measurements, a setup including the Zircon Probe and the Zircon F-stand is used.
Features
- Optimal ergonomic design.
- Wall measurement stand provided with 10º angle indication in 2 dimensions.
- Floor measurement stand enables vertical rotation over 360º.
- Tethered constructions ensure high stability and acoustic transparency.
- Ergonomically placed grips for easy handling.
- Easy to dismantle and transport.
- High performance miniature microphone.
- Includes light-weight protective flight cases.
- Includes cables with connectors and lengths of your choice.
Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| LS14 loudspeaker unit | |||||
| Operating frequency range | Third octave frequency bands | 50 | 10000 | Hz | |
| Nominal impedance | 8 | Ω | |||
| Power handling | Continuous Peak |
50 |
80 |
W | |
| Sound pressure level | At 1m distance in front, at 50 W applied power | 104 | dB | ||
| Microphone power supply | PP3 battery | 9 | V | ||
| Connectors | Microphone input Microphone output Loudspeaker input |
Microdot 3-pole XLR Speakon |
|||
| Weight | 9.5 | kg | |||
| DPA 4060-B microphone | |||||
| Diameter | Prepolarized condenser element | 5.4 | mm | ||
| Operating frequency range | -3 dB | 20 | 20000 | Hz | |
| Sensitivity | at 1 kHz | 14 | 20 | 28 | mV/Pa |
| Equivalent noise level | CCIR 468-1 | 35 | 38 | dB | |
| MM14 microphone mast | |||||
| Source-microphone distance | Without microphone insert With microphone insert |
1.00 1.25 |
m | ||
| Weight | including microphone insert | 0.9 | kg | ||
| FC14 flight case | |||||
| Dimensions | 45x45x45 | cm | |||
| Weight | Filled completely | 20 | kg | ||
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| WS14 stand | |||||
| Horizontal angle of rotation | 10° angle indication with optional snap function | unlimited | deg | ||
| Provided Zircon height | Rotational center locable at 1.6, 1.8,2 . 2.2 m. Tensable at 2 m | 1.5 | 2.2 | m | |
| Weight | Without snap function | 4.5 | kg | ||
| VS14 vertical swivel fork | |||||
| Vertical angle of rotation | LS14 loudspeaker unit 10° angle indication with optional snap function | 40 | 90 | 320 | deg |
| Mounting screw distance | 2 knurled M6 screws | 45 | mm | ||
| Bottom plate width | 40 | mm | |||
| Weight | 2.5 | kg | |||
| FC15 flight case | |||||
| Dimensions | 125x35x17 | cm | |||
| Weight | Filled | 16.5 | kg | ||
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| SW12 stand wheel units | |||||
| Provided additional stand height | 13 | cm | |||
| Dimensions | Each unit folded L x W x H | 69 x 35 x 20 | cm | ||
| Weight | Each unit | 8.5 | kg | ||
| FS14 stand | |||||
| Provided source height | including SW12 units | 1.25 | m | ||
| Flight cases | |||||
| Dimensions L x W x H | FC16 (tubes) FC17 (tripods, table, wires) FC18 (stand wheel units) |
110 x 17 x 14 123 x 37 x 22 73 x 39 x 39 |
cm | ||
| Weight | FC16, filled FC17, filled FC18, filled |
12.5 20.5 30 |
kg | ||
Ordering
The Zircon comprises 3 products.
- Zircon Probe: LS14 loudspeaker unit, CA12 loudspeaker cable assembly, FC14 flight case, DPA 4060-B microphone, MM14 microphone mast, CA14 microphone cable assembly.
- Zircon W-stand (for wall measurements): WS14 stand, VS14 vertical swivel fork, FC15 flight case.
- Zircon F-stand (for floor measurements): 2 SW12 stand wheel units, FS14 stand, FC16, FC17 and FC18 flight cases.
Each product or component can be ordered separately. For pricing and other ordering information, please contact us.