# omnidirectional microphone

> pickup pattern of a microphone

**Wikidata**: [Q11692590](https://www.wikidata.org/wiki/Q11692590)  
**Source**: https://4ort.xyz/entity/omnidirectional-microphone

## Summary
An omnidirectional microphone is a type of microphone that captures sound equally from all directions. Unlike directional microphones, it has a spherical pickup pattern, making it ideal for recording ambient audio or multiple sound sources simultaneously.

## Key Facts
- **Pickup Pattern**: Spherical; responds uniformly to sound from all directions.
- **Subclass Of**: Microphone (acoustic-to-electric transducer).
- **IEV Number**: 801-26-05 (International Electrotechnical Vocabulary classification).
- **Wikidata Description**: "pickup pattern of a microphone".
- **Wikipedia Languages**: Available in Spanish (es) and Galician (gl).
- **Google Knowledge Graph ID**: /g/121nglsr.
- **Sitelink Count (Wikidata)**: 2.

## FAQs
### Q: What is an omnidirectional microphone used for?
A: Omnidirectional microphones are commonly used in applications requiring ambient sound capture, such as conferences, interviews, and field recordings. They are also useful when multiple speakers are present and movement is frequent.

### Q: How does an omnidirectional microphone differ from a unidirectional one?
A: An omnidirectional microphone picks up sound from all directions equally, while a unidirectional (or cardioid) microphone is more sensitive to sound coming from one direction and rejects sound from others.

### Q: Are omnidirectional microphones good for podcasting?
A: Yes, especially in settings with multiple participants or when the speaker moves around. However, they may pick up more background noise compared to directional mics.

## Why It Matters
The omnidirectional microphone plays a critical role in audio engineering and communication technologies due to its ability to capture sound without directional bias. This makes it invaluable in environments where sound sources are mobile or numerous, such as meetings, live performances, and broadcast scenarios. Its design supports natural sound reproduction by avoiding proximity effect and off-axis coloration often seen in directional microphones. As part of the broader class of microphones, it enables diverse applications across media production, teleconferencing, and acoustic measurement systems.

## Notable For
- Equal sensitivity to sound arriving from any direction.
- Absence of null points in its polar response pattern.
- Minimal proximity effect compared to directional microphones.
- Suitability for capturing ambient and environmental audio.
- Common use in lavalier and small condenser microphones.

## Body
### Technical Characteristics
The omnidirectional microphone exhibits a uniform frequency response regardless of the angle of incoming sound waves. This results in a circular or spherical polar pattern graphically representing equal gain in all directions.

### Applications
Omnidirectional microphones are widely used in:
- Conference rooms and meeting setups
- Broadcast journalism and field reporting
- Acoustic testing and measurement
- Vocal and instrumental recording where mobility is key

### Design Advantages
Because they do not rely on phase differences between front and rear ports, omnidirectional microphones avoid the bass boost associated with the proximity effect. This contributes to flatter low-frequency response even at close distances.

### Limitations
While effective in many settings, these microphones tend to capture more ambient noise and reverberation than directional types, which can be problematic in acoustically untreated spaces.

### Classification & Standards
As defined under IEV number 801-26-05, the term belongs to standardized terminology within electroacoustics. It is recognized in both technical literature and international databases like Wikidata and Google's Knowledge Graph.