IEEE P1451.4 is an emerging standard for adding plug and play capabilities to analogue transducers. The underlying mechanism for plug and play identification is the standardisation of a Transducer Electronic Data Sheet (TEDS*). A TEDS contains the critical information needed by an instrument or measurement system to identify, characterise, interface, and properly use the signal from an analogue sensor. The TEDS resides in embedded memory, typically an EEPROM, within the analogue transducer, as defined in the IEEE P1451.4 standard.
 

IEEE P1451.4 defines the method of encoding TEDS information for a broad range of sensor types and applications. In order to cover such a broad range while also keeping memory usage to a minimum, the IEEE P1451.4 TEDS concept utilises the concept of templates that define the specific properties for different sensor types.
 

Instrumentation and software to read TEDS information directly from the transducer are available, for example, from National Instruments, 01dB and OROS.
 

Each G.R.A.S. TEDS microphone is a combination of a TEDS-enabled preamplifier and a microphone cartridge which is sealed with a sticker. The TEDS is programmed to store the calibration information for the specific combination using IEEE P1451.4 TEDS template number 27: microphone with built-in preamplifier.
 

* Transducer Electronic Data Sheet - as proposed by IEEE-P1451.4
 

Click on images for details:

1/4" TEDS Microphones
G.R.A.S. 1/4" TEDS microphones are a combination of various 1/4" microphone cartridges and 1/4" TEDS-enabled preamplifiers: Type 46BF - 1/4" Free-field Microphone Type 40BF + 1/4" Preamplifier Type 26TC with 7-pin LEMO connector Type 46BP - 1/4" Pressure Microphone Type 40BP + 1/4" Preamplifier Type 26TC with 7-pin LEMO connector. Type 46BD - 1/4" Prepolarised Pressure Microphone Type 40BD + 1/4" CCP Preamplifier Type 26CB with Microdot co-axial connector. Type 46BE - 1/4" Prepolarised Free-field Microphone Type 40BE + 1/4" CCP Preamplifier Type 26CB with Microdot co-axial connector.
1/2" TEDS Microphones
G.R.A.S. 1/2" TEDS microphones are a combination of various 1/2" microphone cartridges and 1/2" TEDS-enabled preamplifiers: Type 46AF - 1/2" Free-field Microphone Type 40AF + 1/2" Preamplifier Type 26TK with 7-pin LEMO connector Type 46AP - 1/2" Pressure Microphone Type 40AP + 1/2" Preamplifier Type 26TK with 7-pin LEMO connector. Type 46AR - 1/2" Random-incidence Microphone Type 40AR + 1/2" Preamplifier Type 26TK with 7-pin LEMO connector. Type 46AE - 1/2" Prepolarised Free-field Microphone Type 40AE + 1/2" CCP Preamplifier Type 26CA with BNC co-axial connector. Type 46AD - 1/2" Prepolarised Pressure Microphone Type 40AD + 1/2" CCP Preamplifier Type 26CA with BNC co-axial connector. Type 46AO - 1/2" Prepolarised Wide-frequency Microphone Type 40AO + 1/2" CCP Preamplifier Type 26CA with BNC co-axial connector. Type 46AQ - 1/2" Prepolarised Random-Incidence Microphone Type 40AQ + CCP Preamplifier Type 26CA with BNC co-axial connector.
TEDS Editor Kit
Type 90TP portable TEDS reader and writer based on a hand-held PDA.

Other G.R.A.S. Sound and Vibration products

• Microphones
• Preamplifiers
• Power Modules
• Intensity microphones and calibrators
• Intensity Probes
• Pistonphones and Calibration equipment
• Telephone test head
• KEMAR Manikins - Types 45BM and 45BA
• Artificial ears, ear & mouth simulators
• Accessories
• Handset Positioning System - Type 45EA