Acoustics Engineering - Triton

Triton

Triton USB Audio - Standard
Triton V2 Standard

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).

 

Triton USB Audio - IEPE
Triton V2 IEPE

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 USB Audio CODEC in the list of playback and recording devices.

The white (standard model) or yellow (IEPE model) gain labels indicate the factory set input gains.

Triton Standard backside

Triton Standard back

Triton IEPE backside

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.

SPL measuring ranges for 1 kHz sine wave. All values in dB.
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

Triton
  • 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
Download

You can download the Triton datasheet including all specifications as a pdf.

Download

Specifications

Specifications @ TA = 25 ºC, fs = 48 kHz, fin = 1 kHz, fout = 1 kHz, 16 bit data, unless otherwise noted.
Parameter Condition Min Typ Max Unit
  1. A measurement report on the input and output full scale voltage levels at 1 kHz is provided with each individual Triton.
  2. Because system measurements are often performed by generating an excitation signal at the output, while recording the system response at the input, measurement system quality parameters depend on the Triton input + output chain. Therefore, these parameters are given for a loopback configuration where the output signals are fed back to the inputs using a special converter preserving the respective full scale levels.
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
Load impedance 0
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
Triton input characteristic

Figure 1. Typical input frequency characteristic

Triton output characteristic

Figure 2. Typical output frequency characteristic

Accessories

Attenuator cable

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 and impedance
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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Item Price  
Triton Standard package, including LP03, CA05 and 2 RCA/BNC socket adapters
Input 1 gain:  dB,  Input 2 gain:  dB, 
€ 320,-
Triton IEPE package, including LP03, CA05 and 2 BNC/RCA socket adapters
Input 1 gain:  dB,  Input 2 gain:  dB, 
€ 500,-
CA06 attenuator cable
Attenuation:  dB,  Color:
€ 20,-