M20 Single directional microphone on a service counter

M20 2-Array Directional Microphone: Precision 60° Acoustic Beamforming for High-Noise Counters, Public Services, and AI Voice Capture

HAOKAI Technology

The Haokai M20 Single is an industrial-grade 2-Array Directional Microphone featuring dual-capsule beamforming architecture, a fixed 60° forward pickup angle, and an effective 3-meter capture range. Equipped with active lateral and rear sound shielding zones that block ambient noise, the M20 eliminates side chatter and room reverberation. It is the premier desktop audio capture solution for government service halls, commercial service counters, video meetings, and real-time AI speech transcription pipelines.
Product URL: https://haokaimic.com/products

M20 Single directional microphone with a curved gooseneck and round desktop base

1. The Acoustic Bottleneck: Why Standard Microphones Fail in Real-World Spaces

In busy government service halls, banking teller desks, airport reception counters, and hybrid meeting rooms, verbal communication is mission-critical. Yet traditional audio hardware creates chronic operational bottlenecks:
360° Omnidirectional Puck Microphones: Pick up sound from all directions equally, capturing neighboring counter dialogues, echoing marble floors, customer queues, and air conditioning rumblings into an unintelligible blur.
Standard Cardioid Microphones: Retain a wide 120°–180° acceptance angle that leaks lateral chatter, while forcing speakers to lean awkwardly within 30 cm of the capsule.
Wearable Headsets: Provide voice isolation but inflict severe physical fatigue, look uninviting across service counters, and present hygiene issues during staff shift rotations.
To solve this universal dilemma, Haokai engineered the M20 Single 2-Array Directional Microphone—combining active beamforming precision with effortless, hands-free conversational freedom.

Core Engineering: How the M20 2-Array Directional Microphone Works

The Haokai M20 is an intelligent acoustic filter built upon four synchronized engineering pillars:
① 2-Microphone Array Beamforming Architecture
At the heart of the M20 is a precision-calibrated dual-capsule array. By calculating time-of-flight and phase differentials between the two microphones in real time, the onboard digital signal processor (DSP) amplifies incoming sound waves from the target axis while destructively canceling off-axis acoustic interference.
② Fixed 60° Forward Pickup Angle: The “Acoustic Spotlight”
Rather than scattering sound capture across the entire room, the M20 creates a fixed 60° forward acoustic cone. This 60° window represents the exact human interaction sweet spot—giving seated or standing speakers natural freedom of movement while cleanly rejecting individuals sitting merely inches outside the cone.
③ Valid Sound Pickup Within 3 Meters
No more hunching forward or speaking right against a grille. The M20 delivers full-bandwidth voice pickup within a generous 3-meter (9.84-foot) radius, maintaining voice warmth and volume across spacious consultation counters and meeting tables.
④ Lateral & Rear Sound Shielding Zones
The true breakthrough of the M20 lies in its acoustic dead zones. Any sound originating outside the 60° frontal cone—specifically the 300 degrees encompassing the sides and rear—hits the M20’s active sound shielding barrier. Ticking keyboards, adjacent teller conversations, and ambient hall commotion are attenuated by over 22 dB.

3. Four Mission-Critical Application Verticals

Government & Public Service: High-Integrity Civic & Legal Records
Community Correction Interviews: Sensitive probation case assessments demand private, intelligible voice capture without intimidating the subject with bulky handheld equipment.
Law Enforcement Interrogation Rooms: High-stakes interrogations demand 100% audibility of every statement. The M20 captures clear dialogue up to 3 meters away while rejecting corridor noise and door slams, delivering tamper-proof, court-admissible audio evidence.


Commercial Counter Service: Frictionless High-Traffic Transactions
Hotel Front Desk Cross-Language Reception: Front-desk staff pair the M20 with real-time translation software to translate foreign guest dialogues with zero cross-talk interference.
Bank Counter Consultation: High-value wealth consultations and loan interviews require strict conversational confidentiality and crystal-clear audit recordings.
Airport Service Desks: Amidst roaring flight announcements and rolling luggage wheels, the M20 enables gate agents and ticket clerks to communicate effortlessly.
Shopping Mall Concierge & Retail Desks: Sleek desktop aesthetics that capture buyer inquiries clearly in open commercial plazas.

Office & Meeting: Executive Clarity Without Headset Fatigue
Offline Business Meetings: Placed at the head of a conference table, the M20’s 3-meter reach allows to speak naturally without passing a microphone around.
Remote Video Conferences: Filters out mechanical typing, mouse clicks, and room echo, presenting broadcast-grade vocal clarity to remote stakeholders.
Webinar Recording & Corporate Presentations: Presenters can stand, gesture, and speak freely within the 3-meter zone while maintaining vocal presence.
Corporate Telephone Customer Service: Delivers pristine voice capture for live quality monitoring and supervisor coaching.


Audio & Live Use: Streamlined Streaming & Real-Time AI Engines
Game Live Streaming & Esports: Gamers can slam mechanical keyboards directly behind the M20 without drowning out their live voice commentary.
Podcast Recording & Voiceover: High-fidelity vocal response without expensive acoustic room foam or treatment.
Voice Capture & Biometrics: High-fidelity audio feed for speaker identification and voice authentication systems.

Product specifications of 2-Array Directional Microphone M20

The array microphone board is equipped with four microphone matrix algorithms, including speech enhancement, beam-forming, directional pickup, noise suppression, and automatic gain algorithms. It can achieve bidirectional directional independent pickup and shield human voices outside the pickup angle, which is very suitable for the pickup function requirements of devices such as 1V1 character separation scenarios.
Microphone typedirectional pickup array microphone
Number of digital wheat2 MIC
The farthest pick-up distanceBest within 3 meters
Audio capture rate16KHz/48K @16bit
Sensitivity-26±1dB
SNR65 dB (A)
AOPDispatch external voice suppression≥12 dB SPL
ND≥20dB
Directivity60°
Supporting functionVoice enhancedBeam-formingNoise SuppressionDirectional pick up soundAutomatic Gain Control
Hardware characteristics60 °directional pick upUSB Audio Class 1.0 (UAC 1.0)A button can adjust the volume of the pickupsound and one click mute;Separation of left and right channels
Interface1*USB – Type-c
USB power supply voltage5V+5%
Power ConsumptionRegular work:0.5W 5V, 100mA (Max)

Frequently Asked Questions (FAQ)

Q1: What makes a 2-array directional microphone superior to a standard single-capsule microphone?

A: A single-capsule microphone relies solely on passive mechanical vents to shape its polar pattern, resulting in broad pickup angles that easily leak ambient noise. A 2-array directional microphone like the Haokai M20 combines two precision-matched sensors with active DSP phase beamforming, producing a sharp 60° forward pickup beam and lateral sound shielding dead zones that suppress background noise.

Q2: How does the M20 maintain vocal clarity up to 3 meters away?

A: The M20’s dual-mic array enhances frontal sound sensitivity through constructive interference while maintaining a high Signal-to-Noise Ratio (SNR > 78 dB). This allows the microphone to capture natural vocal dynamics up to 3 meters away without requiring artificial gain boosts that introduce hiss and room echo.

Q3: Why is the M20 recommended for multilingual AI translation counters?

A: AI speech translation engines fail when background chatter or lateral teller speech enters the audio stream. By isolating only the speaker within the 60° forward cone and shielding out lobby commotion, the M20 provides the clean acoustic stream necessary for instant, error-free translation.

6. Official Call to Action
Upgrade your service desks, conference rooms, and interrogation facilities with the Haokai M20 2-Array Directional Microphone:
👉 Official Product Page & Specifications: https://haokaimic.com/products/m20-single

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