Senior Audio - Voice Processing & Environmental Test Engineer

Back to search results

Senior Audio - Voice Processing & Environmental Test Engineer

Herzliya, Tel Aviv District, IsraelHardware

Submit Resume

Apple's Hardware group is home to some of the world's most advanced technologies - powering the experiences that define Apple products.

We are looking for a highly skilled Senior Audio — Voice Processing & Environmental Test Engineer to join our team in Herzliya.

• Test and validate the performance and tuning of core voice processing blocks

• Execute validation under diverse acoustic conditions, speaker configurations, and signal scenarios

• Collaborate with algorithm teams to provide data-driven feedback for tuning and optimization

• Conduct objective voice quality assessments using standardized metrics, including POLQA (ITU-T P.863) and PESQ (ITU-T P.862)

• Organize and manage subjective "golden ear" listening panels to assess voice naturalness, intelligibility, and overall quality

• Define evaluation criteria and scoring methodologies aligned with industry standards and internal quality benchmarks

• Design and execute WER-based testing for scenarios involving voice transcription and speech recognition

• Correlate WER results with upstream audio processing quality to identify degradation sources

• Conduct testing in specialized laboratories that replicate real-world acoustic scenarios, including: Moving vehicles ,Noisy public environments — cafés, restaurants, crowded spacesWindy outdoor settings and Combined environmental stressors

• Measure and track Time to First Word (TTFW) and round-trip audio latency

• Establish performance baselines and monitoring frameworks for continuous tracking across firmware and software iterations

• Design and maintain automated test suites to detect audio artifacts — including glitches, pops, clicks, distortions, and dropouts

• Build regression frameworks that validate audio quality across new firmware and software updates

• BSc in Electrical Engineering, Computer Engineering, Acoustics, Audio Engineering, or a related field

• 7+ years of experience in audio testing, voice quality evaluation, or acoustic system validation

• Proven experience working within or alongside professional audio/acoustic test laboratories

• Demonstrated ability to design repeatable, controlled test environments and methodologies

• Experience with both objective measurement tools and subjective listening evaluation protocols

• Strong system-level understanding with the ability to isolate quality issues to specific processing stages

• Deep understanding of audio signal processing fundamentals — frequency domain analysis, filtering, spectral characteristics, and time-domain behavior

• Hands-on experience with voice quality measurement tools and standards (POLQA, PESQ, 3QUEST, ETSI standards)

• Familiarity with HEAD acoustic test equipment — measurement microphones, artificial heads (HATS), mouth simulators, and anechoic/semi-anechoic chamber setups

• Strong proficiency in Python for test automation, data analysis, audio signal processing, and framework development

• Experience with audio acquisition systems, DACs/ADCs, and real-time audio streaming architectures

• Understanding of latency measurement methodologies in real-time audio systems

• MSc in Acoustics, Audio Signal Processing, Electrical Engineering, or a related discipline — considered a significant advantage

• Experience with speech recognition systems and WER evaluation methodologies

• Background in psychoacoustics or subjective audio evaluation research

• Experience with environmental simulation lab design and commissioning

• Knowledge of ITU-T P-series recommendations and ETSI test specifications

At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here — in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

Learn about accessibility in Apple’s workplace

Submit Resume

Back to search results

See all roles in Herzliya

Content has loaded