P R O D U C T D ATA TEDS Microphones A TEDS (Transducer Electronic Data Sheet) microphone is a cartridge and a preamplifier assembled and sealed in a clean environment. The assembly has one type and serial number. Individual TEDS microphone information is programmed in a data chip inside the preamplifier. TEDS microphones are available with CCLD as well as classical preamplifiers. TEDS is standardized in compliance with IEEE 1454.4. Uses and Features Uses • General sound measurements • Measurement of dynamic pressure fluctuations • Plug‐and‐play • Frequency: 1 Hz to 180 kHz • Dynamic Range: 6.5 dB to 192 dB Brüel & Kjær’s TEDS Microphones TEDS Microphone Benefits The most important benefit of a TEDS microphone is that the actual identity and loaded sensitivity of the cartridge are programmed in the TEDS and thereby readily available for documentation and application purposes. For many Brüel & Kjær TEDS microphones, the individual frequency response is stored on a mini‐CD under the S/N ratio of the microphone. During the manufacturing process the unit is sealed in a clean environment, thus eliminating contamination that could later result in reduced performance. TEDS Templates All Brüel & Kjær TEDS microphones, except Types 4957, 4958 and 4959, use a template that complies with IEEE P1454.4 V 0.9. A mapping that complies with IEEE 1454.4 V 1.0 is available free of charge for new TEDS microphones. Data Transmission Generally, there are two ways that data from the TEDS chip can be transmitted to the analyzer. The simpler way, class 2, uses a separate wire to transmit the data. For classical, LEMO type TEDS preamplifiers, pin 5 is often used for TEDS data transmission. In single‐wire systems, like that used with CCLD, the same conductor is used both for signal and data transmission. This is made possible by using an electronic switch to control the mode of the wire (TEDS data or signal mode). Selecting the Right TEDS Microphone Brüel & Kjær offers a wide range of TEDS microphones, most

Customer‐specific TEDS Microphones Customer‐specific solutions can be made, so if you do not see what you are looking for please ask your local Brüel & Kjær sales office for a quote on a customized solution. Common Specifications The following pages contain short‐form data for the TEDS microphones offered by Brüel & Kjær. For detailed specifications, please see the individual Product Data. Unless otherwise stated all specifications in this Product Data are valid under the following conditions: CCLD Input Types Classical Input Types Dynamic Range Low Limit Dynamic Range High Limit 3% distortion...

Free-field TEDS Microphones Free‐field microphones are designed to have a flat frequency response in a free field. At higher frequencies, reflections and diffractions cause a pressure increase in front of the diaphragm. If not corrected for, this would result in an increased output voltage from the microphone. Free‐field optimization means that the frequency response of the microphone has been designed in such a way that a flat free‐field frequency response at 0° angle of incidence is achieved. Free‐field microphones are commonly used for sound measurement in an anechoic chamber or far away from...

Table 6 Free‐field TEDS microphones with Type 4954 ¼ cartridge Type 4954 is designed for free‐field measurements where a high‐frequency, high‐level prepolarized microphone is required Table 7 Free‐field TEDS microphones with Type 4966 ½ cartridge Type 4966 is suited for free‐field measurements where a high‐sensitivity prepolarized microphone with full 20 kHz bandwidth is preferred Pressure-field TEDS Microphones Pressure‐field microphones are optimized to have a flat frequency response in a pressure field. They are used for measurements in small, closed couplers or close to hard, reflective...

Table 12 Pressure‐field TEDS microphones with Type 4138 1/8 cartridge Type 4138 is designed for pressure‐field measurements where an absolute maximal frequency range is required. This microphone is externally polarized Type 4138 TEDS microphones do not come with a data CD nor with typical frequency response on the calibration chart Diffuse-field TEDS Microphones Diffuse‐field microphones, also called random‐incidence microphones, are designed to have a flat response to signals arriving simultaneously from all directions – that is, a random or diffuse field. They should be used in all situations...

Table 15 Special TEDS Microphones * ±3 dB pressure response limits Types 4941, 4957, 4958 and 4959 microphon

Ordering Information If you do not see what you are looking for, please ask your local Brüel & Kjær sales office for a quote on a customized solution. Order No. Type 4101‐A Binaural Microphone Pressure‐field 1/8 Mic. Type 4138, Preamp. Type 2670, Adaptor UA‐0160 Pressure‐field 1/8 Mic. Type 4138, Preamp. Type 2669‐B, Adaptor UA‐0036 Pressure‐field 1/8 Mic. Type 4138, Preamp. Type 2669‐C, Adaptor UA‐0036 Pressure‐field 1/8 Mic. Type 4138, Preamp. Type 2669‐L, Adaptor UA‐0036 Prepolarized Free‐field 1/2 Mic. Type 4188, Preamp. Type 2669‐C Prepolarized Free‐field 1/2 Mic. Type 4188, Preamp....

Diffuse‐field 1/2 Mic. Type 4943, Preamp. Type 2669‐B Diffuse‐field 1/2 Mic. Type 4943, Preamp. Type 2669‐C Diffuse‐field 1/2 Mic. Type 4943, Preamp. Type 2669‐L Pressure‐field 1/4 Mic. Type 4944 with SMB socket Pressure‐field 1/4 Mic. Type 4944 with 10–32 UNF socket Aerospace Surface Microphone Automotive Surface Microphone Free‐field 1/4 Mic. Type 4954 with SMB socket Free‐field 1/4 Mic. Type 4954 with 10–32 UNF socket 1/4 Prepolarized Free‐field Mic. Type 4954, Preamp. Type 2670 1/2 Low‐noise Free‐field Microphone 1/2 Low‐noise Free‐field Microphone for hand‐held analyzers such as...