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Endevco® model EM46AE ½-inch TEDS microphone

Endevco® model EM46AE ½-inch TEDS microphone

Product catalog summary

Introduction to IEEE P1451.4 Standard:
IEEE P1451.4 is a standard designed to add plug and play capabilities to analog transducers through the use of a Transducer Electronic Data Sheet (TEDS). TEDS provides essential information for identifying, characterizing, interfacing, and using signals from analog sensors. It is stored in embedded memory within the transducer, typically an EEPROM.

TEDS Encoding and Templates:
The standard defines methods for encoding TEDS information across various sensor types and applications. To minimize memory usage, it employs templates that specify properties for different sensor types. For microphones, template number 27 is used, which includes a built-in preamplifier.

Endevco Model EM46AE:
This model combines a ½-inch prepolarized free-field microphone (EM40AE) with a ½-inch Isotron® preamplifier (EM26CA) and a BNC co-axial connector. The signal wire in Isotron® transducers reads TEDS information directly from the preamplifier.

Features and Applications:

Single unit with microphone cartridge and TEDS-enabled preamplifier
Stability and precision acoustic measurements
Repairable design

Specifications:

Frequency Response: 3.15 Hz–20 kHz (±2.0 dB), 5 Hz–10 kHz (±1.0 dB)
Nominal Sensitivity: 50 mV/Pa
Dynamic Range: 138 dB (upper limit), 14.5 dBA (lower limit)
Output Impedance: < 50 Ω
Power Supply: 2 mA to 20 mA (typically 4 mA)
Temperature Range: Operation (-30°C to +70°C), Storage (-40°C to +85°C)
Relative Humidity: 0 to 95% for both operation and storage
Connector: BNC Co-axial
Dimensions: Diameter 13.2 mm, Length 84 mm, Weight 33 g

Accessories:

Pistonphone Model EM42AA
Isotron power supply Model 4416B
Signal conditioner Model 133

Quality and Reliability:
Endevco emphasizes product reliability through stringent quality control and corrective action procedures. Specifications are subject to change for product improvement.

Graphical Data:
Figure 1 illustrates the typical frequency response of the EM46AE model, showing both free-field and pressure responses.

Catalog excerpts

Endevco® model EM46AE ½-inch TEDS microphone-1

IEEE P1451.4 is an emerging standard for adding plug and play capabilities to analog transducers. The underlying mechanism for plug and play identification is the standardization of a Transducer Electronic Data Sheet (TEDS1). TEDS contains the critical information needed by an instrument or measurement system to identify, characterize, interface, and properly use the signal from an analog sensor. The TEDS resides in embedded memory, typically an EEPROM, within the analog 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 utiliztes the concept of templates that define the specific properties for different sensor types. Each Endevco TEDS microphone is a combination of a TEDSenabled 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. Model EM46AE: A combination of ½-inch prepolarized free-field microphone model EM40AE and ½-inch Isotron® preamplifier model EM26CA with BNC co-axial connector. For Isotron® transducers, the signal wire is used for reading the TEDS information directly from the preamplifier. Typical features / applications • Single unit comprising microphone cartridge and TEDS1-enabled preamplifier • Stability • Free-field • Precision acoustic measurements • Repairable Endevco® model EM46AE ½-inch TEDS microphone Description 1 Transducer Electronic Data Sheet - as proposed by IEEE-P1451.4 cmyk

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Endevco® model EM46AE ½-inch TEDS microphone-2

Endevco® model EM46AE ½-inch TEDS microphone Specifications Frequency response: 3.15 Hz–20 kHz: ±2.0 dB 5 Hz–10 kHz: ±1.0 dB Nominal sensitivity: 50 mV/Pa Polarization voltage: 0 V Dynamic range: Upper limit (peak): 138 dB re. 20 ìPa Lower limit (thermal noise): 14.5 dBA re. 20 ìPa Output impedance: Typical: < 50 Ù Power-supply: 2 mA to 20 mA (typically 4 mA) Maximum signal-output voltage (peak): ±8.0 V Temperature: Operation: -30°C to +70°C (-22°F to 158°F) Storage: -40°C to +85°C (-40°F to 185°F) Coefficient (250 Hz): -0.007 dB /°C Relative humidity: Operation: 0 to 95% Storage: 0 to 95% Influence...

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Endevco® model EM46AE ½-inch TEDS microphone

Endevco® model EM46AE ½-inch TEDS microphone

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