[{"data":1,"prerenderedAt":248},["ShallowReactive",2],{"blog-post-eleanor-roosevelt-pearl-harbor-1941-restored":3},{"slug":4,"path":5,"title":6,"description":7,"publishedAt":8,"updatedAt":8,"author":9,"category":10,"tags":11,"featureImage":14,"ogImage":20,"canonical":21,"seoTitle":22,"seoDescription":23,"keywords":24,"readingTimeMinutes":30,"wordCount":31,"bodySegments":32,"hasMath":124,"headings":125,"mediaClips":135,"showFeatureImage":124,"leadFigureHtml":139,"relatedPosts":145,"citations":247},"eleanor-roosevelt-pearl-harbor-1941-restored","/blog/eleanor-roosevelt-pearl-harbor-1941-restored/","Eleanor Roosevelt on the night of Pearl Harbor, 1941: hear it restored","Hours after the attack, and the night before the president spoke to Congress, Eleanor Roosevelt went on the air. Her statement of December 7, 1941, before and after restoration with Diffio AI.","2026-11-06T20:30:00Z","Nathan Harmon","restoration",[12,13],"Audio restoration","History",{"src":15,"alt":16,"widthPixels":17,"heightPixels":18,"srcset":19},"/media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/eleanor-roosevelt-spectrogram.webp","Spectrograms of Eleanor Roosevelt saying \"I have a boy at sea on a destroyer\" on December 7, 1941, original and restored with Diffio AI",1200,600,"/media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/responsive/eleanor-roosevelt-spectrogram-480w.webp 480w, /media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/responsive/eleanor-roosevelt-spectrogram-800w.webp 800w, /media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/eleanor-roosevelt-spectrogram.webp 1200w",{"src":15,"alt":16,"widthPixels":17,"heightPixels":18,"srcset":19},"https://diffio.ai/blog/eleanor-roosevelt-pearl-harbor-1941-restored/","Eleanor Roosevelt's Pearl Harbor broadcast, restored","Hear Eleanor Roosevelt speak on the night of December 7, 1941: her Pearl Harbor statement, original and restored, ahead of the 85th anniversary.",[25,26,27,28,29],"Eleanor Roosevelt Pearl Harbor radio address","Over Our Coffee Cups December 7 1941","I have a boy at sea on a destroyer","first lady radio broadcast 1941","historical audio restoration",2,551,[33,121],{"kind":34,"comparison":35},"audio-comparison",{"passageName":36,"originalSourceNote":37,"originalSrc":38,"restoredSrc":39,"originalWaveformPeaks":40,"restoredWaveformPeaks":97},"Eleanor Roosevelt, December 7, 1941","copy from APM Reports","/media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/eleanor-roosevelt-original.mp3","/media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/eleanor-roosevelt-restored.mp3",[41,42,43,44,45,46,47,45,48,49,50,49,51,52,53,54,55,56,57,58,59,60,61,62,62,63,64,65,41,66,67,68,46,69,67,49,58,70,71,58,58,72,58,73,74,63,74,75,76,60,77,58,78,79,80,63,70,62,45,81,73,82,83,84,71,85,43,86,62,87,88,71,89,75,90,58,75,73,91,52,61,84,58,44,92,93,79,42,94,55,95,45,90,77,96,94],0.7,0.54,0.72,0.37,0.08,0.69,0.68,0.74,0.73,0.12,0.22,0.62,0.3,0.75,0.44,0.87,0.53,0.06,0.89,0.49,0.17,0.63,0.07,0.51,0.4,0.35,0.38,0.65,0.91,0.67,0.79,0.78,0.36,0.84,1,0.43,0.45,0.58,0.56,0.71,0.95,0.28,0.23,0.25,0.13,0.59,0.14,0.77,0.19,0.32,0.1,0.41,0.39,0.34,0.09,0.42,[98,99,100,94,58,68,101,58,102,103,91,101,51,78,53,72,104,105,106,58,107,108,109,102,62,58,78,77,49,110,44,41,41,111,55,71,58,41,112,58,58,113,58,76,114,58,114,115,98,116,104,58,43,52,112,58,72,41,45,75,60,110,117,118,74,87,113,72,119,83,120,114,89,75,66,58,75,77,95,119,89,90,58,96,60,44,98,86,104,104,58,63,94,99,77,53],0.6,0.46,0.66,0.61,0.64,0.57,0.47,0.86,0.55,0.88,0.52,0.18,0.31,0.96,0.85,0.82,0.9,0.98,0.5,0.26,0.27,0.76,0.92,{"kind":122,"html":123},"html","\u003Cp>On the evening of December 7, 1941, the president's wife had a sponsored radio program to do. \u003Ca href=\"https://www.apmreports.org/episode/2014/11/04/eleanor-roosevelt-on-pearl-harbor\">APM Reports\u003C/a> tells how that afternoon the president dictated his "date which will live in infamy" speech while she was across the hall rewriting her broadcast, and it puts the moment this way: "With America under attack, the public heard first from the president's wife." December 7, 2026 is the 85th anniversary. We ran her statement through Diffio AI; the original sits beside the result.\u003C/p>\n\u003Ch2 id=\"how-to-compare-the-original-and-restored-broadcast\">How to compare the original and restored broadcast\u003C/h2>\n\u003Cdiv class=\"blog-chart blog-chart--numbers\">\u003Cp class=\"blog-chart__title\">Before you listen\u003C/p>\u003Cul class=\"blog-numbers\">\u003Cli>\u003Cspan class=\"blog-numbers__value\">Matched\u003C/span>\u003Cspan class=\"blog-numbers__label\">both files have the same loudness, so neither wins by being louder\u003C/span>\u003C/li>\u003Cli>\u003Cspan class=\"blog-numbers__value\">Tone\u003C/span>\u003Cspan class=\"blog-numbers__label\">the restored voice is brighter than the original, so more than the noise changes\u003C/span>\u003C/li>\u003Cli>\u003Cspan class=\"blog-numbers__value\">Her statement\u003C/span>\u003Cspan class=\"blog-numbers__label\">about three minutes, from "Good evening, ladies and gentlemen" to "my faith in my fellow citizens"\u003C/span>\u003C/li>\u003C/ul>\u003C/div>\n\u003Cdetails class=\"blog-details\">\u003Csummary>About our source\u003C/summary>\u003Cdiv class=\"blog-details__body\">\u003Cp>We worked from the copy APM Reports publishes with its First Family of Radio project, not from a disc, so what you hear in the original is the recording's age and the file's compression together. A speech quality model (SCOREQ) reads the original at 2.79 out of 5 and the restored file at 4.72. We compared transcripts of both files and found no changed words.\u003C/p>\n\u003Cp>Her statement opens a regular episode sponsored by the Pan-American Coffee Bureau. After it she goes back to the program already arranged, and that part isn't in this excerpt.\u003C/p>\u003C/div>\u003C/details>\n\u003Ch2 id=\"i-have-a-boy-at-sea-on-a-destroyer\">"I have a boy at sea on a destroyer"\u003C/h2>\n\u003Cblockquote>\n\u003Cp>"I should like to say just a word to the women in the country tonight. I have a boy at sea on a destroyer. For all I know, he may be on his way to the Pacific."\u003C/p>\n\u003C/blockquote>\n\u003Cfigure class=\"blog-figure blog-figure--image\">\u003Cdiv class=\"blog-figure__frame\">\u003Cimg src=\"/media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/eleanor-roosevelt-spectrogram.webp\" srcset=\"/media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/responsive/eleanor-roosevelt-spectrogram-480w.webp 480w, /media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/responsive/eleanor-roosevelt-spectrogram-800w.webp 800w, /media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/eleanor-roosevelt-spectrogram.webp 1200w\" sizes=\"(max-width: 760px) calc(100vw - 40px), 720px\" alt=\"Spectrograms of 16 seconds of Eleanor Roosevelt's statement, original above and restored below\" width=\"1200\" height=\"600\" loading=\"lazy\" decoding=\"async\">\u003C/div>\u003Cfigcaption>Restored, the noise between her words goes dark\u003C/figcaption>\u003Ca class=\"blog-figure__full\" href=\"/media/blog/eleanor-roosevelt-pearl-harbor-1941-restored/eleanor-roosevelt-spectrogram.webp\">View full size\u003Cspan class=\"blog-visually-hidden\">: Spectrograms of 16 seconds of Eleanor Roosevelt's statement, original above and restored below\u003C/span>\u003C/a>\u003C/figure>\n\u003Cdetails class=\"blog-details\">\u003Csummary>How to read the spectrogram\u003C/summary>\u003Cdiv class=\"blog-details__body\">\u003Cp>Sixteen seconds of the broadcast, around "I have a boy at sea on a destroyer", original above and restored below. Time runs left to right, pitch rises from bottom to top, and brighter means louder. In the original, noise fills the space between her words; after restoration that space goes dark.\u003C/p>\u003C/div>\u003C/details>\n\u003Cp>She tells them, "You cannot escape anxiety. You cannot escape a clutch of fear at your heart," and asks them to "go about our daily business more determined than ever." To the young she says: "I feel as though I was standing upon a rock, and that rock is my faith in my fellow citizens."\u003C/p>\n\u003Cp>Americans who weren't on the air were recorded that same month: hear the \u003Ca href=\"/blog/pearl-harbor-1941-man-on-the-street-restored/\">Pearl Harbor street interviews\u003C/a> made for the Library of Congress.\u003C/p>\n\u003Ch2 id=\"for-journalists-educators-and-museums\">For journalists, educators and museums\u003C/h2>\n\u003Cp>Link this page and credit the source of the recording. The whole program is on the \u003Ca href=\"https://www.apmreports.org/episode/2014/11/04/eleanor-roosevelt-on-pearl-harbor\">APM Reports page\u003C/a>.\u003C/p>\n\u003Cdetails class=\"blog-details\">\u003Csummary>Credit line and questions\u003C/summary>\u003Cdiv class=\"blog-details__body\">\u003Cdiv class=\"blog-table blog-table--notes\" role=\"region\" aria-label=\"Table 1: Reuse, Details\" tabindex=\"0\">\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Reuse\u003C/th>\n\u003Cth>Details\u003C/th>\n\u003C/tr>\n\u003C/thead>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>Source\u003C/td>\n\u003Ctd>\u003Ca href=\"https://www.apmreports.org/episode/2014/11/04/eleanor-roosevelt-on-pearl-harbor\">APM Reports: Eleanor Roosevelt on Pearl Harbor\u003C/a>\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Credit line\u003C/td>\n\u003Ctd>"Recording via APM Reports; restored with Diffio AI (diffio.ai)"\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Questions\u003C/td>\n\u003Ctd>Write to me at \u003Ca href=\"mailto:nathan.harmon@diffio.ai\">nathan.harmon@diffio.ai\u003C/a>\u003C/td>\n\u003C/tr>\n\u003C/tbody>\n\u003C/table>\n\u003C/div>\u003Cp>The same kind of restoration works on recordings closer to home: a grandfather's cassette, a reel of a town meeting, an oral history taped in a noisy hall. You can hear the result on three free uploads at \u003Ca href=\"/\">diffio.ai\u003C/a>; downloads need a paid plan.\u003C/p>\u003C/div>\u003C/details>",false,[126,129,132],{"id":127,"text":128,"label":128},"how-to-compare-the-original-and-restored-broadcast","How to compare the original and restored broadcast",{"id":130,"text":131,"label":131},"i-have-a-boy-at-sea-on-a-destroyer","\"I have a boy at sea on a destroyer\"",{"id":133,"text":134,"label":134},"for-journalists-educators-and-museums","For journalists, educators and museums",[136,142],{"kind":137,"src":38,"name":138,"caption":139,"posterSrc":139,"comparisonRole":140,"durationSeconds":141},"audio","Original (copy from APM Reports), Eleanor Roosevelt, December 7, 1941",null,"original",175,{"kind":137,"src":39,"name":143,"caption":139,"posterSrc":139,"comparisonRole":144,"durationSeconds":141},"Restored with Diffio, Eleanor Roosevelt, December 7, 1941","restored",[146,167,190,214],{"slug":147,"path":148,"title":149,"description":150,"publishedAt":151,"updatedAt":151,"author":9,"category":10,"tags":152,"featureImage":153,"ogImage":157,"canonical":158,"seoTitle":159,"seoDescription":160,"keywords":161,"readingTimeMinutes":30,"wordCount":166,"relatedNote":139},"churchill-congress-1941-restored","/blog/churchill-congress-1941-restored/","Churchill's address to Congress, 1941: hear it restored","Winston Churchill in the Senate chamber on December 26, 1941, nineteen days after Pearl Harbor: three passages from the CBS broadcast, before and after restoration with Diffio AI.","2026-11-06T20:00:00Z",[12,13],{"src":154,"alt":155,"widthPixels":17,"heightPixels":18,"srcset":156},"/media/blog/churchill-congress-1941-restored/churchill-spectrogram.webp","Spectrograms of Winston Churchill saying \"What kind of a people do they think we are?\" to Congress in 1941, original and restored with Diffio AI","/media/blog/churchill-congress-1941-restored/responsive/churchill-spectrogram-480w.webp 480w, /media/blog/churchill-congress-1941-restored/responsive/churchill-spectrogram-800w.webp 800w, /media/blog/churchill-congress-1941-restored/churchill-spectrogram.webp 1200w",{"src":154,"alt":155,"widthPixels":17,"heightPixels":18,"srcset":156},"https://diffio.ai/blog/churchill-congress-1941-restored/","Churchill's 1941 address to Congress, restored: hear it","Hear Winston Churchill address Congress on December 26, 1941: three passages from the CBS broadcast, original and restored, ahead of the 85th anniversary.",[162,163,164,165,29],"Churchill address to Congress 1941","Churchill speech to Congress recording","what kind of a people do they think we are","December 26 1941 broadcast",557,{"slug":168,"path":169,"title":170,"description":171,"publishedAt":172,"updatedAt":172,"author":9,"category":10,"tags":173,"featureImage":174,"ogImage":180,"canonical":181,"seoTitle":182,"seoDescription":183,"keywords":184,"readingTimeMinutes":30,"wordCount":189,"relatedNote":139},"edward-viii-abdication-1936-restored","/blog/edward-viii-abdication-1936-restored/","Edward VIII's abdication broadcast, 1936: hear it restored","The speech the BBC says its engineers recorded in defiance of orders: Edward VIII giving up the throne on December 11, 1936, before and after restoration with Diffio AI.","2026-11-06T18:00:00Z",[12,13],{"src":175,"alt":176,"widthPixels":177,"heightPixels":178,"srcset":179},"/media/blog/edward-viii-abdication-1936-restored/abdication-spectrogram.webp","Spectrograms of Edward VIII saying \"the woman I love\" in his 1936 abdication broadcast, original and restored with Diffio AI",1400,640,"/media/blog/edward-viii-abdication-1936-restored/responsive/abdication-spectrogram-480w.webp 480w, /media/blog/edward-viii-abdication-1936-restored/responsive/abdication-spectrogram-800w.webp 800w, /media/blog/edward-viii-abdication-1936-restored/responsive/abdication-spectrogram-1200w.webp 1200w, /media/blog/edward-viii-abdication-1936-restored/abdication-spectrogram.webp 1400w",{"src":175,"alt":176,"widthPixels":177,"heightPixels":178,"srcset":179},"https://diffio.ai/blog/edward-viii-abdication-1936-restored/","Edward VIII abdication speech restored: hear the 1936 talk","Hear Edward VIII's 1936 abdication broadcast, \"the woman I love\", original and restored side by side, ahead of its 90th anniversary.",[185,186,187,188,29],"Edward VIII abdication speech","abdication speech recording","the woman I love speech","December 11 1936 broadcast",513,{"slug":191,"path":192,"title":193,"description":194,"publishedAt":195,"updatedAt":195,"author":9,"category":10,"tags":196,"featureImage":199,"ogImage":205,"canonical":206,"seoTitle":139,"seoDescription":139,"keywords":207,"readingTimeMinutes":212,"wordCount":213,"relatedNote":139},"podcast-audio-quality-study-2026","/blog/podcast-audio-quality-study-2026/","We measured the sound of 1,438 podcasts: the charts don't sound better than the long tail","A measured study of speech quality in 3,525 podcast episodes: chart shows match long-tail shows, genres differ, and the same shows have barely changed since 2017.","2026-11-06T14:51:00Z",[197,198],"Podcasting","Research",{"src":200,"alt":201,"widthPixels":202,"heightPixels":203,"srcset":204},"/media/blog/podcast-audio-quality-study-2026/podcast-quality-by-genre.webp","Bar chart of median speech quality score by podcast genre, from Technology at 4.27 down to Kids and Family at 3.54",1430,1040,"/media/blog/podcast-audio-quality-study-2026/responsive/podcast-quality-by-genre-480w.webp 480w, /media/blog/podcast-audio-quality-study-2026/responsive/podcast-quality-by-genre-800w.webp 800w, /media/blog/podcast-audio-quality-study-2026/responsive/podcast-quality-by-genre-1200w.webp 1200w, /media/blog/podcast-audio-quality-study-2026/podcast-quality-by-genre.webp 1430w",{"src":200,"alt":201,"widthPixels":202,"heightPixels":203,"srcset":204},"https://diffio.ai/blog/podcast-audio-quality-study-2026/",[208,209,210,211],"podcast statistics 2026","podcast audio quality","podcast audio quality statistics","podcast sound quality by genre",6,1409,{"slug":215,"path":216,"title":217,"description":218,"publishedAt":219,"updatedAt":220,"author":9,"category":221,"tags":222,"featureImage":224,"ogImage":230,"canonical":234,"seoTitle":235,"seoDescription":236,"keywords":237,"readingTimeMinutes":245,"wordCount":246,"relatedNote":139},"save-a-loved-ones-voice-recording","/blog/save-a-loved-ones-voice-recording/","How to save a loved one's voice from a voicemail or old family video, and clean it up","A practical guide to saving a loved one's voice from a phone voicemail, a cassette or an old family video, keeping the original safe, and making the voice easier to hear.","2026-11-04T09:00:00Z","2026-11-05T06:54:57Z","guides",[12,223],"Family history",{"src":225,"alt":226,"widthPixels":227,"heightPixels":228,"srcset":229},"/media/blog/save-a-loved-ones-voice-recording/lead-diagram.webp","Diagram of four steps: save the recording to a file, keep the original in two places, clean up a copy and compare it by ear, share the clean copy with family.",1440,810,"/media/blog/save-a-loved-ones-voice-recording/responsive/lead-diagram-480w.webp 480w, /media/blog/save-a-loved-ones-voice-recording/responsive/lead-diagram-800w.webp 800w, /media/blog/save-a-loved-ones-voice-recording/responsive/lead-diagram-1200w.webp 1200w, /media/blog/save-a-loved-ones-voice-recording/lead-diagram.webp 1440w",{"src":231,"alt":217,"widthPixels":17,"heightPixels":232,"srcset":233},"/media/blog/save-a-loved-ones-voice-recording/social-card.png",630,"/media/blog/save-a-loved-ones-voice-recording/responsive/social-card-480w.webp 480w, /media/blog/save-a-loved-ones-voice-recording/responsive/social-card-800w.webp 800w, /media/blog/save-a-loved-ones-voice-recording/social-card.png 1200w","https://diffio.ai/blog/save-a-loved-ones-voice-recording/","How to save a loved one's voice from a voicemail or video","How to save a loved one's voice from a voicemail, cassette or old family video, keep the original safe, and make the voice easier to hear.",[238,239,240,241,242,243,244],"save a voicemail","save voicemail from iPhone","export voicemail on Android","digitize cassette tapes","transfer VHS family videos","back up family recordings","clean up old voice recordings",4,1028,[],1794173866910]