4mm SMD Microphone for TWS Earbuds

The ECM-B4013AL-SMD-29 is a 4 × 1.3 mm SMD microphone designed specifically for TWS earbuds. With omnidirectional directivity and a sensitivity of -29dB±2, it ensures effective sound capture.

Model: ECM-B4013AL-SMD-29
Dimensions: 4 × 1.3 mm
Directivity: Omnidirectional
Sensitivity: -29dB±2
Impedance: 2.2KΩ
S/N Ratio: 65dB
Max SPL: 100dB
Operating Voltage: 2Vdc
Frequency Response: 50Hz~16KHz

Tags: #4mm #Equipment

Performance Overview

Utilizing imported eco-friendly and high-temperature resistant materials, our high-sensitivity 4013 surface-mount microphone head ensures reliable performance under demanding conditions.

Standard Test Circuit

Typical Frequency Response

Appearance Dimension

Packaging Overview

Use ESD-safe reel and carrier tape for packing.
Quantity per reel: approx. 1,000 to 5,000 pcs (varies by model).
Each reel is sealed in a moisture-proof, anti-static bag.
Anti-static measures are strictly followed during packaging.
Labeling includes part number, quantity, lot number, and production date.

Reliability Tests

High Temperature Test: Microphone subjected to +85℃ for 200 hours and exposed to room temperature for 3 hours.
Low Temperature Test: Microphone subjected to -40℃ for 200 hours and exposed to room temperature for 3 hours.
Humidity & Heat Test: Microphone subjected to +55℃, 90% RH for 200 hours and exposed to room temperature for 3 hours.
Hi/Low Temperature Shocking Test: Microphone subjected to [+85℃ 0.5H → room temp 1H → -40℃ 0.5H → room temp 1H] for 10 cycles.
Vibration Test: Microphone subjected to two hours of vibration in x, y, and z directions with frequencies of 10-55Hz and a 1.52mm high amplitude.
Drop Test: Microphone dropped 5 times from a height of 1.0 meter onto a slippery marble floor, without packaging.
Storage Temperature Range: -40℃ to +80℃ (humidity less than 90%).
Operating Temperature Range: -40℃ to +80℃ (humidity less than 90%).
ESD Protection: Microphone withstands electrostatic discharge (ESD) up to ±6KV (contact) and ±8KV (air).

Sampling Process

1

Confirm customer requirements:

Review product application, microphone capsule specifications, usage scenarios, and sound quality needs.
2

Recommend and specify:

Provide recommended microphone capsule models and detailed specifications for customer evaluation.
3

Sample provision and testing:

Deliver microphone samples for customer testing and feedback purposes.
4

Optimize and finalize:

Refine microphone design based on feedback, finalize samples, and proceed to mass production upon quality approval.

Our Certificates

ECMIC Microphone Manufacturer Certificates

Our production meets ISO 9001:2015 and ISO 14001:2015 standards and is tailored for automotive applications under the IATF 16949:2016 standard, ensuring comprehensive quality management. Additionally, our products comply with ROHS, CE, and FCC requirements.