Surveillance

In surveillance applications, microphones can provide critical audio information to assist the operation of video surveillance systems. They can be used not only to receive voice commands, enabling interactive features within the surveillance system, but also to locate and track the source of sounds, helping to accurately identify the location of abnormal events and respond more quickly.

Selection Guide:

  • Talking: Can use microphones with an SNR below 62dB.
  • ENC: Can use microphones with an SNR above 60dB, supporting call quality requirements with high phase consistency and flat low-frequency response.
  • Voice Recognition: Requires high SNR over 64d

IC Name Description SNR AOP Sensitivity LFRO Dimensions Port Location
3SM123C4T1VA-R Analog 57 dB 123 dB -42±1 dBV 63 Hz 2.75 x 1.85 x 0.90mm Top
3SM123C4T1UC-R Analog 57 dB 130 dB -42±1 dBV 63 Hz 3.76 x 2.95 x 1.10mm Top
3SM122KZT1VA-002-R Analog 64 dB 128 dB -38±1 dBV <20 Hz 2.75 x 1.85 x 1.05mm Top
3SM121MZT1UA Analog 66 dB 130 dB -38±1 dBV <20 Hz 3.76 x 2.95 x 1.10mm Top
3SM123GZB1VE-R Analog 61.5 dB 130 dB -38±1 dBV 20 Hz 2.75 x 1.85 x 0.90mm Bottom
3SM122KZB1VD Analog 64 dB 128 dB -38±1 dBV 20 Hz 2.75 x 1.85 x 0.90mm Bottom
3SM121LZB1HA Analog 65 dB 130 dB -38±1 dBV <20 Hz 3.50 x 2.65 x 0.98mm Bottom
3SM222FMT1KA Digital 60 dB 120 dB -26±1 dBFS 38 Hz 4.00 x 3.00 x 1.06mm Top
3SM221KMT1KA-P Digital 64 dB 120 dB -26±1 dBFS 50 Hz 4.00 x 3.00 x 1.00mm Top
3SM221MMT1KA Digital 66 dB 120 dB -26±1 dBFS 10 Hz 4.00 x 3.00 x 1.00mm Direct-top
3SM222KMB1HA-P Digital 64 dB 120 dB -26±1 dBFS 50 Hz 3.50 x 2.65 x 0.98mm Bottom
3SM222NMB1HA Digital 67 dB 120 dB -26±1 dBFS 10 Hz 3.50 x 2.65 x 0.98mm Bottom