
A few months ago, we put out an episode about what silence sounds like, and it caught the attention of Rob Rosenthal, who hosts a podcast called Sound School about the craft of audio storytelling.
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Joanna Solotaroff Fancy seeing you here.
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Sally Helm Top of the morning to ya.
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Top of the morning to ya. You and I are here, Joanna, for a specific reason, not just to chat with each other. Which is the episode that we're airing today on the show. You and I both have a special personal connection to one of the voices that our listeners are about to hear.
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It's true. So I'm so excited to share that our episode on Silence, which was part of our Sound Barrier series that Noam hosted and that you edited and that I edited, was featured on Rob Rosenthal's podcast called Sound School, which really digs into the craft of audio storytelling. And today's episode, he dials way, way, way, way, way into the complexities of silence in storytelling with Noam. Yeah, but also you and I were both students of Rob's and so it just like feels like a little full circle moment to have our work on his show.
B
A little family reunion, if you will. Yeah, Rob is, I mean, I would go so far as to say he is maybe the central teacher in the world of podcasting. Like not just you and I, but many, many producers have come through his classes at the Transom Story Workshop previously at SALT in Maine, and he's just like a huge behind the scenes force in the world of podcasting. Like many, many shows have been affected by his teaching and the way that he sees the craft. So I am so excited to hear him talk to Noam because this episode about Silence, it really is an interesting audio storytelling puzzle. And yeah, I just think it's gonna be amazing to hear Rob and Noam talk about how it was made. So. Yeah, should we let people hear it?
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Joanna I think so.
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Okay.
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Sh.
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This is Sound School. It's the podcast with the backstory to great audio storytelling. It's brought to you by PRX and Transom. I'm Rob Rosenthal. There's no two ways about it. I live in sound. In my house, music is always on or the news in my car or on the bus. I listen to podcasts when I'm outside here on Cape Cod. The wind, the waves, bells ringing on the channel buoys. There's foghorns and all the birds. So many birds. Cape Cod is a waypoint on the Atlantic Flyway, so lots of migrating birds here in the spring. Also in the spring there's these guys, little frogs, peepers. I love the dissonance. So even though I'm very sound centric, give me some silence and I'm just as happy. In fact I sometimes crave silence. No talking, no radio, no music, no podcasts. And by silence, I guess I mean quiet. Since it's hard to achieve absolute silence, there's always something making sound as proof. Listen to this. I'm trying to be a little tricky here. I didn't play any sound, so what you heard, that's the sound where you are. I'm guessing it's not absolute silence, but hopefully it's quiet enough so that I'm coming through loud and clear, even the silent parts. Given how much I appreciate quiet, I was surprised to learn this last fall comes from an episode of Unexplainable, the science podcast from Vox.
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Aaron Westgate used to be an optimist.
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When I was in graduate school, we were working on this question of how we could develop well being interventions to actually make people's lives happier. And we had this idea that if we just put people in an empty room by themselves and just gave them a few minutes to be alone with their own thoughts, that they'd really enjoy it. You know, people always say, oh my goodness, I'm so busy. I wish I just had a few minutes to sit down and think.
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So Erin recruited a whole bunch of people and she had them each spend 15 minutes in an empty room in total silence.
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And most people didn't enjoy it very much. They said things like brushing their teeth was better.
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They hated it. So she decided to flip the whole study on its head. Instead of trying to help people feel better, she was going to try and see how bad she could make them feel by giving them the option to listen to horrible sounds instead.
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So, like someone throwing up nails on a chalkboard, glass breaking, and sure enough, yeah, people would rather listen to sounds of people vomiting, nails on a chalkboard, et cetera, rather than simply sit in silence.
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Is that you? Are you that person?
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Definitely not.
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This is Noam Hassenfeld. He's the host of Unexplainable.
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I wouldn't say I love silence. So I identify with some of the people in that research in that I often find silence uncomfortable. And making this episode was in part kind of a desire to get more comfortable with silence.
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What about silence makes you uncomfortable?
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I guess the same thing that makes everyone uncomfortable is that it's an unstructured space. It can be. It can be difficult, right, to have to structure your entire experience on your own and not be listening to something, be listening to music, be talking to someone, have something structured your thoughts, like art or movies or a book, you know, to be fully on your own, fully Autonomous, you know, it asks a lot of you, to be sure.
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Gnome says he loves a good long hike up a mountain, getting to the top and taking it all in, the view and the quiet. But mostly he likes to fill his ears with music. He's a musician and plays drums. Plus he composes music for Unexplainable. So silence isn't the first sound he's looking for. But wait, is silence a sound?
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So one of the most striking experiences of silence I've felt is like when I was at a symphony and the symphony was working up to a kind of crescendo and like right when it hit the crescendo, it ended. And the moment before the applause, you're just kind of like hit by this experience. And I definitely felt silence, like, hit me across the face.
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Raja goh is a PhD student at Johns Hopkins. He studies psychology and philosophy. And that experience that he had at the symphony, it left him with some pretty basic questions. He'd figured silence was just nothing like the absence of sound, but he felt it. So the question was, what was he feeling?
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So actually, there's a philosophical literature around this. Some people argue that there is a genuine experience of silence, right? So there's something it's like to experience silence. Whereas other people argue that silence is just the absence of experience.
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It sounds like one of those classic bong rip, dorm room questions, like, what is silence?
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This episode on Silence was part of a four part series. Gnome and the crew at Unexplainable called the Sound Barrier. They explored hearing problems like tinnitus, which I always thought was pronounced tinnitus, but either way it's a debilitating ringing in the ears. Another episode dove into audio illusions, sort of like optical illusions when you hear one thing, but it's really something else. Another episode explored the sound of space, and of course, the episode on silence. In a show about silence, it makes sense to have some silence, right? If you're producing a show about the Clash, you'd play songs from the Clash. Of course, if you're producing a story on whalesong, you'd want listeners to hear whalesong in the piece. Problem is, silence is an anathema in a sound story. Include too much silence and a listener might think they accidentally hit the pause button. Or maybe the file is corrupt or the producers goofed somehow. Most radio stations have alarms that go off when there's dead air. Back when I worked in radio stations, people used to say, dead air is bad. Juju Noam was aware of the problem with silence, but he not only wanted to have moments of silence in that episode, he wanted to lean into it.
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I actually had a goal, which is that I wanted people to have the feeling that I think I often get when walking around. Oh, my God, all of these sounds are awesome. Just listen to all of these sounds. And it's difficult. I don't want to say, like, I'm some sort of. Like, I can go out and just, like, listen to the cars drive by and feel excited by it. But I really wanted people to get to the end of the episode and I wanted them to hear my silence and their silence together, like the ambient sound of my studio and the ambient sound of their kitchen or their porch or their yard or their street, wherever they are, and just have this idea of, oh, there are tons of sounds in this space and they're layered in interesting ways.
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Noam understood that he couldn't throw listeners into the deep end of silence, like today on Unexplainable Silence, and then toss in a long stretch of silence. Instead, he did what I've been easing into the silence by sprinkling bits and bobs of silence here and there throughout the episode.
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And the other thing I was thinking of while I was doing it, what I need to score with is silence. There was obviously some music in the episode, but I started thinking about scoring with silence so often where maybe I would have music come in and you'd have a little bit of, like a little post of music. Here we had sort of a post
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of silence, and sure enough, yeah, people
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would rather listen to sounds of people vomiting, nails on a chalkboard, et cetera, rather than simply sit in silence.
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At this point, Aaron was just morbidly curious.
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That was the first moment of silence in the episode, about four to five seconds worth, which is kind of long considering how infrequently silence is heard in an audio story. As the episode went on, a post of silence would sometimes get longer, like the next moment in the story where there's five to six seconds of silence.
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So if silence is a real thing, we can hear, what does it sound like? To find out, I decided to go to one of the quietest places on Earth.
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By that no means an anechoic chamber. It's a room designed by sound engineers to be completely quiet. No sound. Zero. Noem was certainly not the first person to make a pilgrimage to an anechoic chamber. John Cage most famously did so in 1951 side note here. I've listened to several stories about silence over the years. Almost all of them reference the story about John Cage's experience in one of these chambers. It's legendary, mostly because it led to one of the most pivotal moments in music composition, Truly revolutionary. Cage was an avant garde composer, and one time he saw Robert Rauschenberg's work called White Painting. And the painting is just that, three canvases painted white. And at first it seemed to Cage that there was nothing there. But looking closer, he could see texture and flecks of paint and the little shadows cast by those flecks. In the nothingness, there was something. And Cage wondered, and I'm paraphrasing here, is that true for sound? That's when Cage got permission to stand in the Anechoic Chamber at Harvard University.
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I heard in that room two sounds. One was high and one was low. And I thought there was something wrong with the room.
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Cage went outside and he described the sounds to the engineer, who told him that the higher sound was his nervous system and the lower sound was his circulatory system.
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There's no way to stop the reception of sound. If you stop the sounds from the outside, then what you hear are the sounds that are coming from the inside.
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From that experience, Cage concluded there's no such thing as silence. There's always sound. And that led him to that revolutionary composition. 4 minutes and 33 seconds. That's the name of the piece. 4, 4 minutes and 33 seconds. Oh, and by the way, it's 4 minutes and 33 seconds long. The performer does nothing. The audience sits in silence. Whatever sound is made during those 4 1/2 minutes is the composition Noem first heard. 4 minutes and 33 seconds. Or maybe I should say experienced. 4, 33. When he too was at Harvard, a freshman taking a class called Sound, Noise and Music, his teacher told the class, we're going to perform the piece together. And there they sat, listening. Gnome was not impressed.
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Obviously, this is stupid. Like, modern art is dumb. And then you kind of realize what he's trying to do, and it does really shift your perspective on what sound can be. And if you can find something interesting in silence, I mean, come on, then you can find something interesting in anything. Please welcome our soloist, William Marks. In one recording I found, an older man walks out onto the stage wearing a tux with tails and a white bow tie. He sits down at the piano, puts on his reading glasses, and then he closes the part of the piano that covers the keys. He picks up a stopwatch and holds it up with this kind of conductor style flourish, presses go. And just sits there for four minutes and 33 seconds. Cage wrote 433 back in the 50s.
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That, by the way, was the longest stretch of silence up until that point in the episode. Nearly 14 seconds. That is an eternity in podcasting and radio. Noem figured that the first 20 minutes or so of the episode would be setting the table for a long swath of silence. The question was, how long could that silence be?
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It was something that made me very nervous. I was very worried that people would either think there's a glitch or they would roll their eyes.
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At first, Gnome thought, well, maybe I'll just put in a minute of silence.
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And it was always gonna be, you know, some amount of room tone running, like it wasn't just gonna be digital zero. And that felt way too long to me.
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Then Gnome had a conversation with his editor, Jorge.
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He was just like, however much silence you're gonna put at the end of this episode, I'm gonna say, put more at the end of this episode. Like, I kept thinking, oh, it's too much silence. He's like, more silence. Just put a lot. And then Joanna Solotarov, who also edited the episode, was like, oh, maybe we should just do 4 minutes and 33 seconds. Right now, I'm speaking in a soundproof room. It's pretty quiet, it's pretty still. But wherever you're listening, it sounds different. You're hearing my voice, but you're also hearing the ambient sound of wherever you are. Maybe it's a light echo in your room, or the idling traffic as you cross the street, or the tiny buzz from a fluorescent light. So I don't know, maybe this is weird, but what if we just spend a little time in that silence? You're going to have your own particular kind of silence with its own particular small noises. I'm going to have mine. But, yeah, let's. Let's listen to the silence and see what we can hear.
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Well, in the 4 minutes and 33 seconds of recorded silence, there's a rustle of pages. There's a sniffle, a cough, a breath, a sniffle, a shift in the chair. Exhale. There's some movement in an exhale, a sniffle, a knock. Someone opens and closes a door. Somebody else says, not right now. I suppose that's you. There's a mic adjustment, an adjustment in the seat, maybe a pencil on paper. I'm not sure. A movement and some sort of clicking, possibly right at the very end. I'm not sure what that was. Did you purposefully add those sounds?
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Yeah, so some of them were purposeful Some of them were just kind of normally sitting there, and I wanted it to be almost indistinguishable from what a person might hear if they were in their own room. So I just envisioned someone listening to it in a relatively quiet space and then hearing a rustle or a click or a cough or a sniffle or a knock on the door and wondering whether it was in their space, and then having that moment of, oh, I'm in a space and I'm listening to someone else's space, and our spaces have different levels of slight ambient noise. Isn't that interesting? And. And how does that impact everything I listen to?
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Well, I have a weird thought for you. I wondered if you included some sounds in the silence in order for people to recognize the silence.
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Yes. Like, when I started this, I was like, oh, maybe I should just make 4 minutes and 33 seconds of digital zero. Right. Then people will purely hear the 4 minutes and 33 seconds in their own space. Right. They'll just be listening to their space. But I wanted. I don't know, I wanted them to exactly have sort of some idea of the texture of silence. It reflects back on the silence. Like, Digital zero is not interesting.
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Not right now.
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That was 4 minutes and 33 seconds of silence. And this was the third episode of our series, the Sound Barrier. We'd love to know what you thought of when you were listening to your own silence. What did it sound like? What did you hear? As soon as I finished the whole series, I went outside, and I just stood on my back porch of my apartment here in Somerville in Massachusetts, and I just listened. I actually, honestly, I went outside, and I was listening to a podcast, which is. I'm, like, always listening to podcasts. And then I was like, dude, you just did this thing on silence. Like, what are you doing? Why are you filling all this space with podcasts? And so I was listening to this podcast. I took off my headphones, and I just sort of stood there and listened. And I don't know, I was, like, really astounded by all the different things I could hear. And also at different levels. I remember hearing the wind. My neighbor across the way smoking a cigarette, the leaves blowing in the wind. And then I heard footsteps walking through the leaves. That felt like a little bit further away. And then, you know, you have these sort of moments where the traffic is going and then the traffic's stopping as the lights turn red. And it just, like. I close my eyes, and it's almost. I could, like, map my neighborhood in sound. It was a very cool experience.
G
My last thought is I was just in Provincetown for a little winter break, and whenever I'm up there, I always visit the Provincetown Art Museum. And there was a piece there called Piano Sketch Number One Shimmer by an artist named Tess Oldfield. And basically it was just, it was a piano and basically it was timed to start playing every 30 minutes. Why I'm telling you this is because there was a poem on the piano and there was a line in the poem that I wanted to run by you just to see what you had to say. Silence is not absence.
H
Yeah, I mean, I think that is a very succinct way to put it. Like that's sort of our superpower as humans, that we can fill the space or we can imbue meaning into spaces that just seem empty, that everything has something to tell us.
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Thanks to Noam Hassenfeld of the Unexplainable Podcast for talking all things silence. Heads up, people. There is a Transom Festival on the horizon. Ira Glass, Al Letson, Erica Heilman, Jay Allison, Bianca Gaver, all those folks and many others are descending on Woods Hole on Cape Cod in Massachusetts to celebrate the 25th anniversary of Transom. Think of it as a big radio podcasting audio storytelling party. The Transom Festival is happening this September, the 17th through the 19th to be exact. You'll fill your days with listening sessions, masterclass, workshops, performances, and hopefully a swim or two in the ocean. Yes, the water is still warm. Then rumor has it I might even lead a bike trip on the Shining Sea Bikeway. So keep an eye peeled on transom.org for ticket and lodging information. Of course. I'll keep you updated here too. This is Sound School. My production partners are PRX and Transom. My fellow travelers in radio are Genevieve Sponsler, Jay Allison, and Jennifer Jarrett. Rob I'm Rob Rosenthal. Thank you very much for listening.
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Podcast: Unexplainable (by Vox)
Episode Air Date: April 20, 2026
Summary by: [Summarizer AI]
This special episode, "A show about nothing," takes the listener on a deep exploration of the concept of silence—what it is, how we experience it, and its role in audio storytelling. Through an interview between Rob Rosenthal (of Sound School) and Noam Hassenfeld (host of Unexplainable), the episode dissects the challenge and artistry of capturing silence in sound-based media, referencing both cutting-edge research and iconic moments from music history. The conversation pulls back the curtain on Unexplainable's "Silence" episode, revealing the thoughtful choices that shaped its creation.
"People would rather listen to sounds of people vomiting, nails on a chalkboard, etc., rather than simply sit in silence."
— Aaron Westgate, recounted by Noam Hassenfeld [07:54]
"Some people argue that there is a genuine experience of silence...others argue that silence is just the absence of experience."
— Raja Goh [09:51]
"I often find silence uncomfortable...it's an unstructured space...asks a lot of you, to be sure."
— Noam Hassenfeld [08:18]
"I wanted it to be almost indistinguishable from what a person might hear in their own room...then having that moment of, oh, I'm in a space and I'm listening to someone else's space..."
— Noam Hassenfeld [20:31]
"However much silence you're gonna put at the end of this episode, I'm gonna say, put more..."
— Noam Hassenfeld, quoting his editor Jorge [18:16]
"Maybe we should just do 4 minutes and 33 seconds."
— Joanna Solotaroff [18:16]
"The higher sound was his nervous system and the lower sound was his circulatory system. There’s no way to stop the reception of sound..."
— John Cage, via Rob Rosenthal [15:10]
"I was...astounded by all the different things I could hear...I could, like, map my neighborhood in sound. It was a very cool experience."
— Noam Hassenfeld [24:56]
"That's sort of our superpower as humans, that we can fill the space or imbue meaning into spaces that just seem empty, that everything has something to tell us."
— Noam Hassenfeld [26:14]
This episode of Unexplainable/Sound School is an exploration of the boundaries and possibilities of silence—not as empty space, but as presence, texture, and experience. It invites listeners to question what they hear (or don’t hear), and to reconsider silence as a meaningful, ever-present part of sound and life.