The Triton is a USB/Audio interface intended for acoustical measurements. Several models are available that differ in input configuration.
The Standard model is provided with unpowered inputs and RCA sockets, while the IEPE (Integrated Electronics Piezo Electric) model is
provided with BNC sockets and constant-current (4.5 mA) powered inputs.
The Standard model Triton V2 is a drop-in replacement for the original Triton.
IEPE is also known as ICP® (Integrated Circuit Piezoelectric, registered by PCB Group, Inc.) and DeltaTron® (registered by Brüel & Kjær Sound & Vibration Measurement A/S).
The Triton was designed with Dirac in mind, but can also be used in many other applications. The USB Plug & Play architecture and the compatibility with native Microsoft™ Windows™ and Apple Computer™ OS X drivers enable instant use without proprietary driver installation.
The features that make the Triton particularly suited to acoustic measurements with Dirac,
are the overload indicator and the lack of any volume controls that could interfere with
repeatable calibrated measurements.
The IEPE model allows the direct connection of a measurement microphone and thus removes the need to use to an SLM as measurement front-end.
The Triton USB-C socket at the backside is connected to the PC by the enclosed USB-A/C cable. The Triton will appear as
The white (standard model) or yellow (IEPE model) gain labels indicate the factory set input gains.
Triton Standard back
Triton IEPE back
With a microphone connected to the IEPE input, the input gain determines the effective measurement range. The table below shows the measurement range as a function of input gain for several common microphone sensitivities.
| Input Gain | S = 20 mV/Pa | S = 30 mV/Pa | S = 40 mV/Pa | S = 50 mV/Pa |
|---|---|---|---|---|
| 0 | 46 ... 131 | 42 ... 127 | 40 ... 125 | 38 ... 123 |
| 10 | 36 ... 121 | 32 ... 117 | 30 ... 115 | 28 ... 113 |
| 20 | 26 ... 111 | 22 ... 107 | 20 ... 105 | 18 ... 103 |
| 30 | 16 ... 101 | 12 ... 97 | 10 ... 95 | 8 ... 93 |
The default gain for the Standard model is 0 dB (on both inputs). For the IEPE model the default gain is 10 dB (on both inputs).
Features
- USB-bus powered
- Inputs: Standard (unpowered RCA sockets) or IEPE (4.5 mA powered BNC sockets)
- Analog input overload indication
- No manual controls, ensuring reproducible measurements.
- Factory set input gains: 0, 10, 20 or 30 dB
- Optional attenuator cable for standard inputs
- Input and output 1 kHz level measurement report included
- Compact and robust design
- Plug & Play installation on Windows and other operating systems.
- Includes USB cable and protective leather pouch.
- Ideal for use with DIRAC software
Applications
- Room acoustics - Concert hall, studio or stage parameters
- Building acoustics - Sound insulation or loss factor
- Road acoustics - Road surface or sound barrier absorption or insulation
- Electronic systems - Transfer functions or spectral impedance
- Acoustic signals - Sound levels or frequency spectra
- Electronic signals - Voltage levels or frequency spectra
Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
|
|||||
| Inputs (general) | |||||
| Full scale voltage |
0 dB input gain 10 dB input gain 20 dB input gain 30 dB input gain |
2.0 0.63 0.20 0.063 |
Vp | ||
| Full scale RMS voltage 1) |
0 dB input gain 10 dB input gain 20 dB input gain 30 dB input gain |
1.4 0.45 0.14 45 |
V V V mV |
||
| Full scale error | -0.2 | 0 | 0.2 | dB | |
| Overload trigger voltage | -0.5 | 0 | dB | ||
| Frequency range (see figure 1) |
±0.1 dB re 1 kHz level +0.1/-0.3 dB re 1 kHz level +0.1/-3 dB re 1 kHz level: · 0, 10 or 20 dB input gain · 30 dB input gain |
40 20 4 6 |
21 k 22 k 23 k 23 k |
Hz | |
| Resolution | 8 or 16 | bit | |||
| Sample frequency |
8, 11.025, 16, 22.05, 32, 44.1 or 48 |
kHz | |||
| Standard Inputs | |||||
| Allowable AC voltage |
0, 10 or 20 dB input gain 30 dB input gain |
15 5 |
Vrms | ||
| Allowable DC voltage | -25 | 25 | V | ||
| Input impedance | 9.9 | 10.0 | 10.1 | kΩ | |
| IEPE Inputs | |||||
| IEPE DC supply current | Input voltage Vcc = 0 ... 23 V | 4 | 5 | mA | |
| Allowable AC voltage |
0, 10 or 20 dB input gain 30 dB input gain |
25 5 |
Vrms | ||
| Allowable DC voltage | 0 | 24 | V | ||
| Input impedance | Vin within 0 ... 23 VDC range | 60 | kΩ | ||
| Outputs | |||||
| Nominal full scale voltage | 2 | Vp | |||
| Full scale RMS voltage 1) | Load impedance = 10 kΩ | 1.4 | V | ||
| Full scale error | -0.5 | 0 | 0.5 | dB | |
| Allowable DC voltage | -25 | 25 | V | ||
| Output impedance | 100 | Ω | |||
| Load impedance | 0 | Ω | |||
| Frequency range (see figure 2) |
±0.1 dB re 1 kHz level +0.1/-0.3 dB re 1 kHz level +0.1/-3 dB re 1 kHz level |
6 4 1 |
18 k 21 k 23 k |
Hz | |
| Resolution | 8 or 16 | bit | |||
| Sample frequency | 32, 44.1 or 48 | kHz | |||
| Loopback 2) | |||||
| SNR | Full scale / Silence, unweighted 0...24 kHz | 86 | dB | ||
| Crosstalk | Channel 1 to 2, vice versa, 0...24 kHz | -80 | dB | ||
| THD+N |
Full scale, input + output 2) -5 dB re full scale, input + output |
-82 -84 |
dB | ||
| Dynamic range | Input + output | 85 | dB | ||
| USB | |||||
| USB compatibility | USB 1.1 - 2.0 | ||||
| USB connector | USB-C | ||||
| General | |||||
| Supply current |
Standard IEPE, both inputs loaded |
70 130 |
mA | ||
| Audio sockets |
Standard IEPE |
RCA BNC |
|||
| USB cable length | 1 | m | |||
| Dimensions | w x h x d, sockets excluded | 82 x 22 x 40 | mm3 | ||
| Weight |
Standard IEPE |
111 121 |
g | ||
Figure 1. Typical input frequency characteristic
Figure 2. Typical output frequency characteristic
Accessories
The Triton package contains a Triton USB audio interface, an LP03 leather pouch, a CA05 USB-A/C cable, 2 RCA/BNC socket adapters (Standard model) or 2 BNC/RCA socket adapters (IEPE model), a Quick Guide and a measurement report.
With the standard Triton model you can attenuate the input voltage or to increase the input impedance,
by using an input series resistor, which forms a voltage divider with the Triton input impedance.
The table below shows the attenuation for some standard E96 series resistors.
You can mount yourself resistors in the cable plugs, or order CA06-AAC attenuator cables from Acoustics Engineering.
The table below contains the coding for the table. E.g. A red cable with an attenuation of 3 dB has the ID CA06-03R.
| Input attenuation [dB] | Input impedance [kΩ] | AA | C (Color) |
|---|---|---|---|
| 0 | 10.0 | 00 | B (Black) R (Red) |
| 3.0 | 14.1 | 03 | |
| 6.0 | 20.0 | 06 | |
| 10.0 | 31.5 | 10 | |
| 20.0 | 101 | 20 |
Ordering
The Triton can also be ordered from Brüel & Kjær as part number ZE-0948.
Please contact us if you require more details regarding the choice of input gain(s).
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