The picture in a video interview can be flawless, but if the sound is poor, viewers notice within the first second and often close the video right away. Microphone choice is one of the most important, and most underrated, decisions in video production. Each microphone type has its place, and the right choice depends on the situation, not the price tag.
Lavalier microphones
Lavalier microphones are small units clipped to clothing a few centimeters below the chin. They are the standard choice for interviews where a person sits in one place and speaks directly to camera or to an interviewer. The advantage is consistent volume, since the microphone stays at a fixed distance from the mouth regardless of head movement.
The downside is that clothing friction noise can cause problems if the mic is not mounted correctly, or if the speaker wears noisy materials such as synthetic jackets. Wireless lavalier systems give the speaker freedom to move, which is useful when an interview happens while walking or demonstrating a product.
Shotgun microphones
Shotgun microphones pick up sound in a narrow direction and are mounted on a camera or a boom pole above the frame. They are the best choice when a lavalier mic cannot or should not be visible in the shot, such as documentary-style interviews or spontaneous street conversations. A shotgun mic also works better when several people take part in an interview and the microphone moves between speakers.
The main challenge is distance. A shotgun mic needs to stay reasonably close to the speaker, typically 30 to 60 centimeters above the head, to capture clear sound. Too much distance means more background noise and room echo in the recording.
Wireless microphone systems
A wireless system consists of a transmitter connected to a lavalier or other microphone, and a receiver connected to a camera or audio recorder. These are nearly mandatory in situations where the speaker moves around, walking through a factory floor, showing rooms, or leading a group. Good wireless systems stay stable at 50 to 100 meters without interference, but cheaper systems can pick up signals from other wireless devices, causing noise or dropouts.
A useful rule: always test a wireless system on location before an important shoot, since Wi-Fi networks and other electronics can interfere with the signal, especially in office buildings full of equipment.
How to avoid wind and background noise
When filming outdoors, wind noise is one of the most common causes of poor audio. The fix is a foam or fur windscreen on the microphone, which can cut wind noise by 80 to 90 percent. Never shoot an important interview outdoors without a windscreen, even on a seemingly calm day, since even a light breeze produces audible noise.
For background noise, such as air conditioning, traffic, or crowds, the best solution is to change the location or the time of the shoot. When that is not possible, moving the microphone closer to the speaker reduces the relative level of background noise in the recording.
For professional interviews and podcasts, it is best practice to use multiple microphones at once, one per speaker, and record each channel separately so volume can be controlled precisely during editing. This is the approach used in professional interview and podcast production, since it guarantees clean audio regardless of shooting conditions.
Recording levels and practical placement tips
Regardless of microphone type, correct recording level matters as much as the choice of microphone itself. It helps to record so the loudest moments stay around minus 6 dB, leaving headroom for unexpected volume spikes such as laughter or a raised voice. If the level is too low, boosting volume during editing also amplifies background noise, so it is better to record slightly louder than too quiet.
Lavalier placement also affects sound more than it might seem. The microphone should sit centered on the chest rather than to one side, and should avoid direct contact with hair or necklaces. A test recording before filming starts is a mandatory step that takes only a couple of minutes but can prevent an hour-long problem in the edit.
On budget, an entry-level wireless lavalier kit costs around 150 to 300 euros, while professional-grade systems with more stable signal and better audio quality start around 600 euros. The right choice depends on filming frequency: for regular commercial use, investing in professional gear pays for itself quickly by cutting down time spent fixing audio problems in post-production.
If you are planning an interview series or a podcast and want to ensure professional sound quality, contact us to choose the right equipment and approach.