Yes, many security cameras can record audio. But do all CCTV cameras record sound? Is it legal to use audio surveillance in your area? And how can you tell if your system supports it?
In this guide, we break down everything you need to know about audio in security cameras, from how it works and what to look for, to privacy laws and innovative ways businesses are using it for real-time intervention. Whether you’re upgrading or simply curious, here’s the clear and simple truth.
Can all security cameras record audio?
Some security cameras can record audio, but not all models include this feature by default. Many modern surveillance cameras, especially IP and dome cameras, come with built-in microphones, allowing them to capture both video and sound. This can be essential for gaining context during incidents, such as identifying voices or background noise.
Is recording audio on a security camera illegal?
Yes, in some U.S. states, it can be. Audio recording laws vary based on whether the state follows one-party consent or two-party consent rules:
- One-party consent states that only one person involved in the conversation needs to be aware that it’s being recorded, which makes workplace audio recording more legally flexible.
- Two-party (or all-party) consent states that everyone being recorded must be aware of and agree to the recording; recording without permission can be illegal and may lead to lawsuits.
Now, in today’s world, where theft has become more sophisticated, especially internal theft, which causes more shrinkage than shoplifting, it’s understandable to want to record audio. But if you’re using CCTV with audio or speakers in a workplace, always check your state’s wiretapping and privacy laws.
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If you post clear signage, obtain written consent from employees, and consult a legal advisor before activating the audio recording, you can avoid any potential legal disputes.
Read our blog for surveillance laws in detail, especially regarding one-way or two-way consent:
How far can a CCTV camera record audio?
Most CCTV microphones can pick up sound within a 20- to 40-foot (6- to 12-meter) radius. That said, clarity depends on more than just distance.
- Background noise, such as traffic, wind, or machinery, can drown out voices.
- Mounting height matters too; the lower the mic (ideally 7–9 feet), the better it picks up speech. However, going too low risks tampering with it.
- Whether using a built-in mic or an external one, keep in mind: placement and environment are everything.
Steve Corona. Audio Technician/DJ with 44 years of experience, says:
“For best results, always test the mic in real conditions and consider adding noise filters if needed. Almost any digital isolation software should help. I like to have as much control over the sonic characteristics of music or sound reproduction as possible.
How to tell if a security camera has audio?
- Enable audio in its settings.
- Check the camera model specifications.
- Look for a small pinhole mic near the lens.
- IP cameras vs analog.
- Review product documentation or mobile app settings.
- Check the cables coming out of the camera.
Enable audio in its settings:
- Log in to the camera’s web interface using its IP address in a browser.
- Go to the settings menu and look for sections such as “audio,” “video and audio,” or “stream settings.”
- Enable audio input (toggle ON) and select the correct input type (like Line-In or Mic).
- Save your settings and test the audio in live view or stream.
Check the camera model specifications:
Look under the Technical Specifications section of the camera’s product page or manual. Look in the specs for terms like:
- “Audio input/output”
- “Built-in microphone”
- “Two-way audio”
- “Audio codec: G.711 / AAC / PCM” (means audio is processed)
If you’re using a PDF manual, search for “Audio Analytics.” This not only confirms the presence of a microphone but also indicates whether the camera supports innovative audio features.
Look for a small pinhole mic near the lens:
Some CCTV cameras have a single small hole, while others may have a cluster of 4-5 holes. Different cameras may have microphones positioned in various locations. Such as:
- Dome cameras typically have a microphone hole, often located at the bottom of the casing.
- Bullet Cameras have a mic hole near the lens or side panel.
- IP cameras vs analog.
IP cameras often have built-in microphones for easy audio capture and two-way communication. Analog cameras typically require external microphones.
- Review product documentation or mobile app settings.
If your camera system includes a mobile or desktop app, open the live feed from your camera and check the audio settings. Look for an option to enable, turn on/off, or adjust the microphone input. Some apps also include two-way talk features or volume sliders.
If you can hear ambient sound or conversations when audio is turned on, your camera is actively recording or streaming audio. Be sure to test this in a quiet room to eliminate background noise interference.
- Check the cables coming out of the camera.
Hezekiah Awoyefa, a security systems technician, says “Look for the white cable coming out of the camera”.
To see if your CCTV camera supports audio, take a quick look at the cables coming out of it. You should see three distinct connectors:
- Red is for power.
- Yellow is for video recording.
- White is for audio recording.
Best cameras with audio capabilities:
IP cameras, wireless security cameras, and video doorbells have built-in microphones. They are the first choice for the surveillance and monitoring of businesses, both indoors and outdoors. Hidden cameras also have audio capabilities.
When evaluating CCTV systems for audio surveillance, it’s critical to understand how different manufacturers approach microphone integration.
The Axis M1075-L and M3116-LVE feature built-in microphones, both of which are optimized for indoor monitoring with edge analytics and basic audio pickup.
If you require two-way communication, Axis also provides models with audio I/O ports for external microphone and speaker integration, ensuring scalability without compromising clarity.
Bosch Security Systems takes a more advanced approach with its Flexidome IP Starlight 8000i and Autodome IP Starlight series, integrating high-sensitivity microphones with superior noise reduction. These models are designed for mission-critical environments, such as airports, transport hubs, or urban surveillance, where audio clarity is crucial for incident response.
If your CCTV camera doesn’t have audio capabilities, then it’s not a big problem.
How to connect an external microphone:
CCTV microphone kit:
If your CCTV camera does not have a microphone, you can add an external microphone by wiring it into the DVR/NVR system via audio input ports for analog CCTV setups. The external microphone can be connected in just a few simple steps. The kit is readily available online. It includes:
- CCTV microphone with power/audio connectors.
- 50ft RCA/BNC combo cable.
- Power adapter.
- BNC-to-RCA adapters.
- Splitter cable (audio & power distribution).
All you need to do is wire a PTZ Camera with a Two-Lead Audio Input.
- Plug the mic’s power cable into a 12V power supply.
- Connect the mic’s RCA jack to a video balun using an RCA-to-BNC adapter.
- Connect the balun’s white wire to audio (+) and black wire to audio (−) on the PTZ.
- Turn on the camera and enable audio in its settings.
Why do you need a security camera with audio for your business?
Cameras come with a built-in microphone to detect sudden spikes in noise, like:
- Shouts or screams.
- Detect glass break.
- Car alarms.
- Aggressive voices or raised tones.
- Explosions or crashes.
- Arguments or fights.
- Panic or distress in voices.
- Calls for help.
- Crowds shouting or chanting.
On their own, microphones can pick up loud noises, but they can’t always tell what’s important. Video analytics adds context, like violence or a crowd forming.
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When sound and visuals work together, the system can better detect real threats and ignore harmless events. That means faster, more accurate responses and less time wasted on false alarms.
Want a safer business? Here’s how security cameras with audio help:
Two-way audio for communication:
When combined with video analytics, these audio cues become part of a smarter system that can:
- Prioritize real incidents.
- Verify threats with both sight and sound.
- Alert staff immediately with context-rich data.
With cloud-based monitoring, your cameras don’t just sit and record; they connect to live operators who can intervene in the moment.
The moment an intruder is spotted, a remote operator can issue a loud, clear warning:
“This area is under surveillance. You’re being recorded. Leave immediately.”
These audio talk-downs are often enough to stop criminals in their tracks. In most cases, they either flee immediately or stay put as the remote operator engages them, until security or police arrive, or until pre-set SOPs by the client are followed.
Where is the audio recording saved? Local vs cloud storage:
Once your camera captures sound, you have two main ways to store it:
- Local storage keeps everything on-site, usually on a memory card or recorder. It’s simple, there are no monthly fees, and you’re in complete control. But if the device gets damaged or stolen, the footage (and audio) could be lost.
- Cloud storage saves your recordings online. You can access them from anywhere, and there’s less risk of losing data. It’s a great option if you want to manage multiple locations or need extra backup.
Intelligent systems that help you stay legal:
Recording audio isn’t just about security; it’s also about doing things the right way. Business-grade systems often come with tools that help you stay compliant with the law, like:
- Alerts or signs that let people know they’re being recorded.
- Access controls ensure that only authorized personnel can listen to or download recordings.
Whether you’re running a small shop or a large site, these built-in features make it easier to protect your space without crossing any lines.
Frequently asked questions:
Is recording audio with a security camera illegal?
Recording audio may be illegal without consent, depending on local laws. Always check state regulations before enabling audio.
How to find out if a CCTV system has audio?
Check the camera’s specs for terms like “built-in mic” or “audio input”. Some cameras also have visible pinholes near the lens for microphones.
Is recording audio on a security camera in a workplace illegal?
In many regions, recording workplace audio without employee consent can violate privacy laws. Clear signage or written permission is often required.
Outdoor security camera with audio recording
Look for weatherproof IP cameras, such as the Arlo Pro or Reolink Argus 3, which offer built-in microphones and audio recording capabilities for outdoor use.
Do security cameras have audio recording?
Many modern IP cameras include built-in microphones, but not all models support audio. Always check product details before buying.
Conclusion:
Yes, many modern security cameras can record audio, but not all do. IP cameras often come with built-in microphones and two-way audio capabilities, while analog systems typically require an external microphone.
Whether for home or business, audio can add critical context during incidents. But before enabling sound, always check local laws, especially in workplaces or public areas.
With the proper setup and legal compliance, audio-equipped CCTV can help prevent crime, support real-time interventions, and deliver a smarter, more responsive security system.
Contact us today to discuss a customized security solution tailored to your business needs.
