Blog
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Outbound Voice Agent Testing: Voicemail, Answer Rates, Compliance and a Go-Live Test Plan
Outbound voice testing for AI agents: the call outcome funnel, a who-answers test matrix, 2-second rules, spam labels, and Python to audit call logs.
Voice Agent Test Cases vs Assertions: What Each Is, Examples, and How to Version Them
Voice agent test cases vs assertions: clear definitions, a worked example, assertion types, pass^k, production monitors and a repo layout for versioning.
Backchanneling and Proactivity in Voice Agents: When to Say 'Mm-hm' and When to Speak First
When a voice agent should say mm-hm, use a filler or speak first. Research on timing, LiveKit and Pipecat settings, and metrics with code to test it.
Voice Agent Cost by Use Case: AI Voice Agent Cost Per Call and Per Month for 24 Use Cases at 10k–1M Minutes
AI voice agent cost per call for 24 use cases on an in-house stack, from $0.06 to $0.49 per call, with monthly totals, sensitivity, and a calculator.
Leading vs Lagging Voice Agent Metrics: Catch Problems Hours Before CSAT Drops
Leading vs lagging indicators for voice agents: map 15 metrics by time-to-signal, prove which predict CSAT, and alert on them hours before surveys move.
The Cost of Latency in Voice Agents: What Each 100 ms Does to Hang-Ups, Handle Time and Revenue
Voice agent latency impact, priced: what the research proves, a labeled model for AHT, hang-ups and revenue, and code to measure your own latency curve.
Voice Agent Benchmarks Explained: VoiceBench, VoiceAgentBench, Full-Duplex-Bench, τ-Voice and More
What VoiceBench, VoiceAgentBench, Full-Duplex-Bench, HumDial, VocalBench, Audio MultiChallenge, τ-Voice and Big Bench Audio measure, and what they miss.
Why Voice Agents Get Stuck Repeating Themselves (and How to Detect Repetition Loops)
Why a voice agent keeps repeating itself: eight root causes, a re-ask rate metric, Python loop detection for transcripts, and a fix ladder that ends loops.
Voice Call Quality Metrics for Voice Agents: Codecs, Packet Loss, Jitter and What They Do to STT
How G.711 vs Opus, packet loss, jitter and PLC change STT accuracy on phone calls, with the E-model math, stat field names and a netem test plan.