Company: PeopleLink Unified Communications Pvt. Ltd.

Job Function: Hardware R&D; / Audio Engineering / Product Engineering

Position: Senior Engineer – Electroacoustics / Audio Systems

Location: India

Employment Type: Full-Time

About PeopleLinkPeopleLink Unified Communications Pvt. Ltd. develops professional collaboration, unified communications, audio-video, and intelligent meeting-room solutions. Our engineering teams work across hardware, embedded systems, acoustics, audio DSP, video, AI, and software to develop complete communication products.

We are looking for an experienced Electroacoustics Engineer to join our Hardware & Product R&D; team and drive the acoustic architecture, design, tuning, measurement, and validation of our professional audio products.

The role will primarily focus on products such as conference-room speaker systems, speaker bars, microphone arrays, conferencing endpoints, classroom audio systems, and integrated audio-video collaboration devices.

The engineer will work from early acoustic architecture and transducer selection through prototype development, DSP tuning, acoustic measurement, validation, and production optimization.

Key Responsibilities

- Own the electroacoustic design and performance of PeopleLink audio and conferencing products.
- Design and optimize loudspeaker systems, speaker bars, microphone systems, microphone arrays, and integrated conferencing audio solutions.
- Perform speaker driver and microphone selection based on sensitivity, frequency response, impedance, power handling, directivity, distortion, SNR, SPL, and application requirements.
- Design and optimize acoustic enclosures, speaker placement, microphone placement, ports, damping materials, acoustic chambers, and mechanical integration.
- Perform acoustic simulations and design assessments using tools such as COMSOL, FEA, BEM, or equivalent simulation platforms.
- Define acoustic architecture for products based on room size, coverage requirements, target SPL, speech intelligibility, frequency response, and conferencing use cases.
- Measure and optimize:
- Frequency response
- Sound Pressure Level (SPL)
- Total Harmonic Distortion (THD/THD+N)
- Signal-to-Noise Ratio (SNR)
- Directivity
- Microphone sensitivity
- Speaker sensitivity
- Acoustic echo performance
- Speech intelligibility
- Noise performance
- Perform audio DSP tuning and calibration, including:
- Equalization (EQ)
- Automatic Gain Control (AGC)
- Dynamic Range Compression (DRC)
- Noise Suppression (NS)
- Acoustic Echo Cancellation (AEC)
- Beamforming
- Automatic microphone gain control
- Feedback suppression
- Limiting
- Speaker protection
- Develop and validate microphone-array and beamforming architectures for conference-room applications.
- Optimize full-duplex conferencing performance involving loudspeakers, microphones, AEC, noise suppression, and far-end/near-end speech.
- Analyze acoustic echo paths and work with DSP engineers to improve AEC convergence, echo return loss, double-talk performance, and overall voice quality.
- Develop and execute structured subjective listening tests and objective audio measurements.
- Establish reference listening methodologies and define measurable sound-quality acceptance criteria.
- Perform room-acoustic assessments for meeting rooms, classrooms, boardrooms, and collaboration spaces where required.
- Develop automated or semi-automated audio measurement and characterization workflows using Python and/or MATLAB.
- Work closely with Mechanical,



Electronics, Embedded, DSP, Firmware, Industrial Design, QA, Manufacturing, and Product Management teams.
- Review mechanical designs from an acoustic perspective and provide recommendations for enclosure geometry, speaker positioning, microphone positioning, vibration isolation, damping, and acoustic leakage.
- Support prototype bring-up, engineering validation, design validation, pre-production, and mass-production stages.
- Investigate audio issues using measurement data and perform systematic root-cause analysis.
- Work with manufacturing teams to define production-level acoustic tests and pass/fail criteria.
- Create acoustic specifications, test procedures, characterization reports, tuning reports, and design recommendations.
- Establish and continuously improve PeopleLink's electroacoustic measurement and validation capabilities/laboratory.
- Evaluate emerging technologies in professional audio, spatial audio, microphone arrays, beamforming, AI-based noise suppression, voice enhancement, and intelligent audio processing.

Minimum Qualifications
- Bachelor's or Master's degree in Electronics, Electrical Engineering, Acoustics, Electroacoustics, Audio Engineering, Physics, Signal Processing, or a related engineering discipline.
- Strong understanding of acoustic theory and electroacoustic fundamentals.
- Strong understanding of loudspeaker and microphone characteristics, including:
- Frequency response
- Sensitivity
- Impedance
- Directivity
- SPL
- THD
- SNR
- Resonance
- Power handling
- Practical experience designing or tuning real-world audio products.
- Strong foundation in Digital Signal Processing (DSP) and audio signal processing.
- Experience with at least several of the following:
- AEC
- Beamforming
- Noise suppression
- AGC
- EQ
- Compression
- Filtering
- Feedback cancellation
- Speaker protection
- Proficiency with Python and/or MATLAB for signal analysis, measurement automation, modelling, and data analysis.
- Experience using skilled acoustic measurement equipment and tools.
- Ability to interpret time-domain, frequency-domain, FFT, impulse-response, distortion, and spectrogram measurements.
- Strong debugging and root-cause-analysis skills.
- Ability to independently take an acoustic problem from measurement → analysis → solution → validation.

Desired Qualifications
- 3–8+ years of relevant industry experience in electroacoustics, professional audio, consumer audio, conferencing audio, automotive audio, smart speakers, soundbars, microphone systems, or related products.
- Experience developing conference-room or unified-communications audio products is highly preferred.
- Experience with microphone-array design and multi-microphone beamforming.
- Strong practical knowledge of Acoustic Echo Cancellation (AEC) and full-duplex communication systems.
- Experience with audio DSP platforms or solutions from vendors such as XMOS, Analog Devices, Qualcomm, NXP, Texas Instruments, Cirrus Logic, or equivalent.
- Experience with I2S, TDM, USB Audio, HDMI ARC/eARC, Bluetooth Audio, S/PDIF, and digital audio interfaces.




- Experience with audio codecs, ADCs, DACs, class-D amplifiers, microphones, and loudspeaker integration.
- Experience using acoustic measurement platforms such as:
- Audio Precision / APx
- HEAD Acoustics
- Klippel
- Brüel & Kjær
- REW
- ARTA
- Equivalent professional measurement systems
- Experience with COMSOL Multiphysics, FEA, BEM, or other acoustic simulation environments.
- Experience designing or setting up an electroacoustic laboratory, including microphones, artificial mouths, reference speakers, acoustic measurement equipment, test fixtures, and calibration procedures.
- Knowledge of relevant audio and communication standards, including ITU-T, ETSI, 3GPP, IEC, IEEE, and related electroacoustic standards.
- Understanding of room acoustics, reverberation, speech intelligibility, acoustic treatment, and sound-system coverage.
- Experience with statistical analysis and structured subjective listening evaluations.
- Knowledge of C/C++ or embedded audio development is an advantage.
- Exposure to machine learning / AI-based audio processing, including speech enhancement, noise reduction, source separation, acoustic event detection, or intelligent beamforming, is an advantage.

Education & ExperiencePreferred:

Master's degree in Acoustics, Electroacoustics, Audio Engineering, Electronics, Electrical Engineering, Signal Processing, Physics, or a related discipline with 3+ years of relevant product-development experience.

OR

Bachelor's degree in Electronics, Electrical Engineering, Audio Engineering, or a related discipline with 5+ years of relevant electroacoustic/audio product-development experience.

Candidates with exceptional hands-on expertise in professional audio, conferencing systems, loudspeaker design, microphone-array design, or audio DSP will also be considered.

What We Expect From This Role

This is not purely a simulation or research position.

The successful candidate should be comfortable working directly with speakers, microphones, DSP boards, amplifiers, acoustic test equipment, mechanical prototypes, PCBs, and complete conferencing products.

You should be able to take a product such as a conference speaker bar or microphone array and answer engineering questions such as:

- Is the selected speaker suitable for the enclosure and target room?
- What SPL and frequency response can the system realistically achieve?
- Where should microphones and speakers be positioned?
- Why is speech sounding distant, metallic, noisy, or distorted?
- Why is the AEC failing under certain conditions?
- How should the microphone array geometry be optimized?
- What EQ, AGC, NS, AEC, beamforming, and limiter parameters should be tuned?
- How does the mechanical enclosure affect audio quality?
- How can objective measurements be correlated with perceived sound quality?
- What needs to change before the product moves into mass production?

We are looking for an engineer who can combine acoustic science, measurement, DSP understanding, practical experimentation, and product engineering to deliver measurable improvements in audio quality.

Key SkillsElectroacoustics | Audio DSP | Speaker Design | Microphone Arrays | Beamforming | Acoustic Echo Cancellation (AEC) | Noise Suppression | AGC | EQ | Loudspeaker Tuning | Acoustic Measurement | Audio Precision | HEAD Acoustics | Klippel | COMSOL | MATLAB | Python | Room Acoustics | Conference Audio | Unified Communications | Embedded Audio | I2S/TDM | USB Audio

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