First record whether a call reaches its intended destination and which direction of speech is missing or unclear. An unanswered call and a connected call with poor visitor audio are different symptoms. These observations help the service team examine call routing, endpoint audio and the microphone separately instead of assuming that every assistance failure comes from the microphone.
Intercom and assistance
Microphone for access assistance
The microphone captures the visitor’s voice at an intercom or assistance point. Match this audio component to the installed endpoint, its electrical input and the enclosure, then test conversation quality from the user’s normal position.
- Role
- Access-point audio input
- Audio path
- System defined
- Performance
- Component-specific specifications
Audio path first
Match the microphone to the intercom and the conversation point.
The microphone captures the visitor’s voice. It is one component in an audio path that also needs compatible electronics, a listening device and a configured answering destination.
Is a microphone a complete intercom?
No. A microphone supplies audio input; it does not provide the entire conversation or call-routing system. For two-way assistance, check the intercom, speaker or listening device, operator endpoint and call configuration together.
Identify the component before replacing it
Provide the installed intercom model, existing microphone reference and photos of the connections. Confirm electrical compatibility, connector and physical fit. A replacement that fits the opening is not necessarily suitable for the endpoint’s audio input.
Test speech where the visitor actually stops
Check the caller’s normal position with vehicle noise, wind and nearby audio equipment. Test both directions of a real call after installation, and review any recording requirements with the configured assistance system; the microphone alone does not define recording.
Intercom servicing
Replace the microphone with the right part.
The microphone captures the user’s voice. Its connection and mounting must fit the installed intercom.
- Identify the assembly
- Use the intercom model and the existing microphone reference.
- Match the connection
- Check the connector, wiring and mounting against the compatible replacement.
- Test a call
- Check voice capture after installation from the normal user position.
Technical Characteristics
| Specification | Details |
|---|---|
| Type | Omnidirectional Condenser |
| Frequency Response | 50 Hz – 16 kHz |
| Sensitivity | -35 dBV/Pa |
| Output | Line Level (XLR / 3.5 mm) |
| Noise Floor | <25 dB SPL |
| Max SPL | 120 dB |
| Power | Phantom 48 V |
| IP Rating | IP67 |
| Dimensions | 18 mm diameter |
| Mount Type | Thru Hole (PC Pins) |
| Port Location | Top |
| Size / Dimension | 0.181" Dia (4.60 mm) |
| Height (Max) | 0.079" (2.00 mm) |
Confirm the assembly and component measurement references against the selected model drawing.
Equipment details
Microphone and intercom compatibility
The microphone captures the visitor’s voice at the call point. For a replacement, the installed intercom and the existing component reference are the starting point.
| Component or use | How it fits the system |
|---|---|
| Component identification | Include the intercom model and a photo of the existing microphone, its label and its connections in a replacement request. |
| Audio connection | The microphone connects to the endpoint’s audio electronics. Its electrical characteristics and connector must suit that audio input. |
| Physical fit | The component must fit the enclosure and sound opening while leaving the intended protection and service access in place. |
| Call test | After installation, test a conversation from the user’s normal position with the answering operator. |
Configuration: Pickup pattern, frequency response, sensitivity, noise, power, connectors and environmental ratings depend on the selected component.
Equipment questions
Practical details for planning, operating and maintaining this equipment.
A commissioning record can describe the test position, ambient conditions, connected endpoint and whether both parties understood the agreed test conversation. Use planned test participants and record the result rather than retaining incidental visitor speech. If recordings are required for another purpose, define that requirement and handling process separately within the approved assistance system.
Project review
Find the microphone for your intercom.
Send the intercom model and a photo of the microphone and its connections to discuss a compatible replacement.