Sound monitoring microphones

Discussion in 'Analog & Mixed-Signal Design' started by Ermes, Mar 17, 2018.

  1. Ermes

    Thread Starter New Member

    Mar 17, 2018
    1
    0
    Hello! I'm new in this forum and this is my first post .
    I have four sound monitoring microphons which I want to install in four different rooms and I want to hear this rooms from a fifth room by my head-phones.
    The microphones it seems like this
    [​IMG]

    Can I connect the microphones parallel?
    Can you give me some advice on how to do that in correct way so as to avoid the noise and to hear loud and clear?

    This microphones have embedded amplifier ( when I connect my headphones to one microphone I can hear clear and loud).

    Thank you in advance!
     
  2. sghioto

    Active Member

    Dec 31, 2017
    520
    71
    In this case I would not connect them in parallel. There is a better way but a link to the mic module would help or a larger photo of the PCB.
    SG
    EDIT: found better image looks pretty close to the above.
    [​IMG]
     
    Last edited: Mar 17, 2018
    Ermes likes this.
  3. MrChips

    Moderator

    Oct 2, 2009
    16,730
    5,130
    TQ-008

    ☞Technical parameters:

    The product uses high-fidelity low-noise processing chip, through multiple frequency selective suppression of environmental noise and high-frequency interference sound, echo cancellation cavity effectively reduce the serious echo of empty room, to achieve perfect radio. Tone pure, dynamic and powerful, built-in automatic gain control (AGC) circuit carefully designed. Adapted to banks, prisons, examination rooms, shopping malls, industrial production and other pickup places, with low noise, high fidelity, wide operating voltage range, low power consumption, long transmission distance and so on. TQ-008 is a new type of pickup with adjustable sensitivity. It is the ideal product for television monitoring and security system. It can be used in conjunction with video camera for video and audio synchronization. Monitor range: 5m2--150m2

    ☞The main parameters:
    ◆ Wiring: Red: 12V power supply, white: then audio signal
    ◆ working voltage: DC 5V ~ 12V
    ◆ Current consumption: 12mA
    ◆ Frequency range: 300 ~ 5kHz
    ◆ Frequency response: 2-5dB
    ◆ Output impedance: 600 Ω
    ◆ Output level: 0 ~ 6V
    ◆ Appearance Size: Φ = 69mm, h = 39mm
    Advantages: the signal transmission line with a core shielded cable is the most ideal, copper Φ = 0.3mm2 can pass 600 meters.

    ☞Features:
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    1 manual

    ☞ Package list:
    1pcs pickup

    sku:SYQ2496
     
  4. sghioto

    Active Member

    Dec 31, 2017
    520
    71
    In this case a shielded 3 wire cable from each module to a mixer-headphone amp should work. I would think that the output impedance of the module is fairly low if you can drive a set of headphones which is why I don't think you can connect them in parallel.
    SG
    EDIT: "The product uses a high fidelity low-noise processing chip", but not just any chip it's a, "Israel high-fidelity/low noise processing chip".:rolleyes:
     
    Last edited: Mar 17, 2018
  5. sghioto

    Active Member

    Dec 31, 2017
    520
    71
    Ermes, can you get the number off the IC chip in the module?
    SG
     
  6. Audioguru

    Expert

    Dec 20, 2007
    10,385
    1,140
    The outputs of the microphone modules must be connected to an audio mixer circuit that can feed your headphones.
     
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