{"observation":{"id":"51d6bd25-a8ea-40b3-917b-6ff528871561","tool":"noiz-ai","tool_name":"Noiz AI","criterion":"voice-quality","criterion_name":"Voice Quality","criterion_definition":"Clear, clean, professional audio with minimal artifacts or distortion.","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"Clean, clear audio with minimal artifacts is a basic requirement for professional voiceovers. (3 of 3 judges)","scenario":"educational-explainer","scenario_name":"Educational Explainer","group_tag":"voiceover-narration","scenario_description":"An educational narration explaining why the sky changes color during sunset, intended to test clarity, scientific pronunciation, and calm long-form explanation.","modality":"text","input_text":"Have you ever wondered why the sky changes color during sunset? It all comes down to the way sunlight travels through Earth's atmosphere. During the day, blue light is scattered in every direction, making the sky appear blue. But as the sun gets lower, its light travels through much more of the atmosphere. Most of the blue light gets scattered away, leaving behind the warmer reds, oranges, and pinks that create those beautiful evening skies we love to watch.","input_artifact_refs":[],"stresses":["Clarity of informational narration","Pronunciation of scientific terms","Calm and engaging delivery","Pacing consistency","Voice quality during long-form explanation"],"verdict":"worked","score":null,"score_total":null,"note":"Records clear, clean audio with minimal artifacts, even though the voice itself remains somewhat robotic.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://d3epheqghktydj.cloudfront.net/noiz-ai-noiz-ai-educational-explainer-output-bb492dfa14aa.wav","role":"output","alt":null}],"run_id":"2cc0c2ec-33ac-4420-b0c5-85214fa9e409","study_title":"Generate Professional Voiceovers","study_kind":"generation","research_task":"86baq76ud","tested_at":null,"completeness":"input-and-output","input":{"state":"text","text":"Have you ever wondered why the sky changes color during sunset? It all comes down to the way sunlight travels through Earth's atmosphere. During the day, blue light is scattered in every direction, making the sky appear blue. But as the sun gets lower, its light travels through much more of the atmosphere. Most of the blue light gets scattered away, leaving behind the warmer reds, oranges, and pinks that create those beautiful evening skies we love to watch.","files":[],"modality":"text","stresses":["Clarity of informational narration","Pronunciation of scientific terms","Calm and engaging delivery","Pacing consistency","Voice quality during long-form explanation"]},"tool_page_slug":"noiz-ai","tool_url":"https://aidemos.com/tools/noiz-ai","permalink":"https://aidemos.com/evidence/51d6bd25-a8ea-40b3-917b-6ff528871561","api_url":"https://ai.aidemos.com/v1/observations/51d6bd25-a8ea-40b3-917b-6ff528871561"},"peers":[{"id":"c893bfcb-b137-416b-8bb9-25f589310613","tool":"cartesia-ai","tool_name":"Cartesia.ai","verdict":"worked","score":null,"score_total":null,"note":"Delivers clean, crisp audio with minimal artifacts, at a quality the report describes as professional for educational uses.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/cartesia-ai-cartesia-educational-explainer-output-5465e0bd9b7a.wav","evidence_url":"https://aidemos.com/evidence/c893bfcb-b137-416b-8bb9-25f589310613"},{"id":"f560c8b0-ddf9-40c2-a440-cf6db2b42030","tool":"epidemic-sound-voices","tool_name":"Epidemic Sound Voices","verdict":"worked","score":null,"score_total":null,"note":"Delivers clear, clean, professionally recorded audio with no noticeable distortion or artifacts affecting usability.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/epidemic-sound-epidemic-sound-educational-explainer-out-82428c134ec6.wav","evidence_url":"https://aidemos.com/evidence/f560c8b0-ddf9-40c2-a440-cf6db2b42030"},{"id":"730ebbd3-dd37-4ff3-b4e4-243edf423c64","tool":"minimax","tool_name":"Minimax","verdict":"worked","score":null,"score_total":null,"note":"Outputs clean, professional audio with clear speech and no noticeable background artifacts or distortion.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/minimax-io-minimax-educational-explainer-output-e4de825b86df.wav","evidence_url":"https://aidemos.com/evidence/730ebbd3-dd37-4ff3-b4e4-243edf423c64"},{"id":"5606a930-a6a4-42e5-9dc9-f7a1d4c730e0","tool":"murf-ai","tool_name":"Murf AI","verdict":"mixed","score":null,"score_total":null,"note":"The recording quality is clean and calm with minimal audio artifacts, but the robotic tone and lack of expressive variation weaken the overall result.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/murf-ai-murf-ai-educational-explainer-output-ecec3d709ef1.wav","evidence_url":"https://aidemos.com/evidence/5606a930-a6a4-42e5-9dc9-f7a1d4c730e0"}],"other_criteria":[{"id":"dab10ea6-d19a-40a9-aeca-9442cecf011e","criterion":"emotional-delivery","criterion_name":"Emotional Delivery","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"Generally matches the calm explanatory tone, but the delivery lacks subtle variation and becomes less engaging over longer passages.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/dab10ea6-d19a-40a9-aeca-9442cecf011e"},{"id":"92636344-5ff7-45ae-9ed3-6bb7c2efe2f9","criterion":"naturalness","criterion_name":"Naturalness","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"Maintains a conversational style, but the voice still sounds noticeably AI-generated and synthetically toned rather than fully natural.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/92636344-5ff7-45ae-9ed3-6bb7c2efe2f9"},{"id":"004d01bb-6390-4088-b36a-f169143eb850","criterion":"pacing-rhythm","criterion_name":"Pacing & Rhythm","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"Places pauses according to punctuation, but the pacing becomes inconsistent in the back half of the passage and can sound harsh there.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/004d01bb-6390-4088-b36a-f169143eb850"},{"id":"f54ce345-1146-442a-91fe-7d36d27554a4","criterion":"pronunciation-accuracy","criterion_name":"Pronunciation Accuracy","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Pronounces names, technical terms, and punctuation correctly, with consistent clarity across the explainer.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/f54ce345-1146-442a-91fe-7d36d27554a4"}],"appears_in":[{"page_type":"ranking","slug":"ai-voiceover-tools","title":"Best AI Tools for Professional Voiceovers","url":"https://aidemos.com/best/ai-voiceover-tools","binding":"run"},{"page_type":"tool","slug":"cartesia-ai","title":null,"url":"https://aidemos.com/tools/cartesia-ai","binding":"run"},{"page_type":"tool","slug":"epidemic-sound","title":null,"url":"https://aidemos.com/tools/epidemic-sound","binding":"run"},{"page_type":"tool","slug":"minimax-io","title":null,"url":"https://aidemos.com/tools/minimax-io","binding":"run"},{"page_type":"tool","slug":"murf-ai","title":null,"url":"https://aidemos.com/tools/murf-ai","binding":"run"},{"page_type":"tool","slug":"noiz-ai","title":null,"url":"https://aidemos.com/tools/noiz-ai","binding":"run"}],"same_scenario":[{"id":"c893bfcb-b137-416b-8bb9-25f589310613","tool":"cartesia-ai","tool_name":"Cartesia.ai","verdict":"worked","score":null,"score_total":null,"note":"Delivers clean, crisp audio with minimal artifacts, at a quality the report describes as professional for educational uses."},{"id":"f560c8b0-ddf9-40c2-a440-cf6db2b42030","tool":"epidemic-sound-voices","tool_name":"Epidemic Sound Voices","verdict":"worked","score":null,"score_total":null,"note":"Delivers clear, clean, professionally recorded audio with no noticeable distortion or artifacts affecting usability."},{"id":"730ebbd3-dd37-4ff3-b4e4-243edf423c64","tool":"minimax","tool_name":"Minimax","verdict":"worked","score":null,"score_total":null,"note":"Outputs clean, professional audio with clear speech and no noticeable background artifacts or distortion."},{"id":"5606a930-a6a4-42e5-9dc9-f7a1d4c730e0","tool":"murf-ai","tool_name":"Murf AI","verdict":"mixed","score":null,"score_total":null,"note":"The recording quality is clean and calm with minimal audio artifacts, but the robotic tone and lack of expressive variation weaken the overall result."}]}