300 episodes
303 The hypnotic passage of a dredger heading up the estuary towards Burnham-on-Crouch, Essex
01/11/2026 | 1hHere's something different to accompany this episode - an account of the aural happenings as the passage of time progresses. We collected this soundscape just east of Burnham-on-Crouch in Essex last week on a beautifully sunny late autumn afternoon.
The Lento box was tied to a post facing out across the water, pointing at the opposite bank which is Wallasea Island. We sat silently still, in sight of the box and experienced this special place as you do now through headphones.
You can as usual just let the soundscape flow over your ears as the passage of time unfurls. Or listen and read along with the show notes below.
0:00
Scene begins as a small aircraft brightly lit in the strong afternoon sunshine transits the sky over the estuary
redshank fly in
a curlew can be heard dead ahead
a small boat appears, sailing up the estuary from left to right of scene
when the sound of the small aircraft fades away in the western sky (extreme right of scene) the sound of the small boat is more audible as it sails against the flow of the outgoing tide
4:00
gulls cry far right of scene
a steady breeze blowing in from the east presses against the left side of the box
tidal water gently laps the newly exposed mud and vegetation
another light aircraft appears in the east, also on a westerly heading
6:33
distant but very distinctive 'crump'
a munition is detonated on the firing range ahead and centre of scene (about 3 miles to the south) this is the military firing range on Foulness
more distant crumps can be heard at intervals
sea birds call across the water
8.00
wings of a bird swooping in to land
bird lands on the exposed mud to the right of the post
steady onshore breeze presses against the left side of the Lento box
9:00
a bird that's landed quite near to the mics mid-left rattles at something it's found at the shallow water's edge
11.00
the low resonant tone of a larger vessel gradually develops in the east (extreme left of scene) the vessel is sailing mid-stream on a westerly heading inland and towards Burnham-on-Crouch
sea birds swoop low over the water
soon a heavy crump from the firing range thuds followed by more crumps
the vessel continues engine humming against the outflowing tide
14:33
a jet aircraft traverses the sky its sound soft ten thousand feet or more
the larger vessel is now identifiable as a dredger
the sound of the dredger and the jet aircraft meld for a time
distant crump of another explosion on the firing range
16:30
the dredger's sound becomes clearer and more sonorous as it begins to draw level with the post holding the box
slowly the dredger crosses the centre point of the soundscape
more crumps from the firing range
19:00
the dredger's heavy engines move into a more reverberant area of the landscape beginning to thrum the airspace across the estuary like low organ pipes
clanks from machinery on deck
tidal water can be heard gently washing along the vegitated tidal zone about ten yards in front of the post
21:30
the dredger is sailing steadily now upstream against the outgoing tide
machinery clanks from its deck
sea birds call from across the water
redshank, curlew, black headed gulls
22:30
the dredger's organ pipe-like drone feels more hypnotic now as it continues on its west heading moving against the outgoing tide towards Burnham-on-Crouch (extreme right of scene)
24:23
captain of the dredger lowers power
nearby birds call out in the low afternoon sunshine
the dredger's reverberant drone eases to a chug
far right of scene the barks of a dog
27:14
deck crew start to operate a chain mechanism
gulls call overhead
mechanisms whine
the captain begins to maintain the vessel's position against the current in the midstream
tidal water gently lapping to left of the microphone box is washing through the newly exposed beds of estuary vegetation
28:23
voices of the crew can be heard operating the equipment on deck
28:56
captain powers up the engine then trims back to re-position the vessel in the mid-stream flow
the dredger does its work
machinery on-deck whines
gulls wheel and circle high over the water
30:40
a herring gull flies passed the mics from right to left
31.00
to left of scene gulls circle
the estuary water is stilling with every minute of outflowing tide that passes
almost mirror like in places
32:30
the captain powers up the engines begins to sail again west against the outflowing tide
centre of scene curlew and redshank fly low over the expanse of estuary water calling as they go
tiny wavelets wash through the vegetation about ten yards infront of the post
36:20
sound of dredger softens as it progresses inland up the River Crouch
37:20
curlew briefly call
black headed gulls caw
the vessel continues its slow droning progress
38:24
a Cetti's warbler can just about be heard singing on scrubland some way behind the mics
38:50
curlew call over the water
distant geese can sometimes be heard far ahead on the Wallasea Island side of the estuary banks
40:30
easterly breeze presses in once again against the left side of the Lento box
crows call as they fly in across the landscape over the opposite bank
42:25
Here you'll notice a dip in the soundscape. We've taken out the loud transit of a low altitude jet aircraft. The plane appeared behind the microphones and headed south. The noise unbalanced the scene so we made the decision to fade out and blend in the passage of time that followed. The cut means we cannot say this episode is an ear-witness report.
43:00
calm has returned to the sound landscape enabling us to hear the calls of all the various sea birds
45:00
the tidal water has become almost still lapping water along the shore edge, just about audible
the dredging vessel continues its passage heard now as a shapeless noise extreme far right of scene
the estuary is now clear for the curlew and redshank to patrol
crows call across the scrubland far behind the microphones
46:30
a lone walker slowly passes on the seawall path from left to right.
another small aircraft appears again from behind the microphones
47:50
gulls fly over and another curlew swoops low over the opposite bank calling
50:15
curlew calls dead ahead and another plane begins to transit. As it is at much higher altitude and passes more softly and we feel does not disrupt the balance of the soundscape
the estuary water appears flat the tidal flow is essentially unmoving and slack
53:37
Redshanks fly in
54:20
very subtle popping of newly exposed mud along the shoreline
estuary landscape is calm and restful now in the late afternoon sunshine (sun is low in sky to extreme right of scene)
55:00
over on opposite bank a flock of landed geese can just about be heard
several curlews patrolling the exposed shorelines
56:10
a goose takes off from the opposite bank circles up over the water then turns east, followed soon after by the calls of two curlews
(there are many geese resting on the opposite bank. Shortly after we finished recording and packed up the Lento box They all take off and from the path we stopped to video them.)
59:10
the lead goose returns flying high over the water
59:28
something on the opposite bank disturbs the water
sea birds respond
a curlew calls from mid-left of scene shortly after
60:00
sound scene ends with more calls of flying redshank and curlew
the soft thrum of Burnham-on-Crouch continuing extreme right of scene under the setting sun- Cicadas seem to go quiet when the rain sets in. They probably need to keep themselves dry to be able to make their sound. In this landscape recording we made in early August nearly all of the cicadas have stopped by about ten minutes. Then it's just the rain, and the rolling thunder, and the occasional fleeting calls of birds. And, if you are able to hear it, the watery flowings of the River Muga.
The day started hot and humid. Nothing but blue skies above the high mountain peaks that surround this remote area. But as the afternoon progressed the skies became grey. Then greyer. Then began to grumble with distant thunder. The thunder is what made us go out with the Lento box despite the threat of heavy rain.
With the rain starting to come down properly we walked along the narrow streets of Sant Llorenc, leaving the village walls. We found a tree growing at the foot of the ancient allotments along a rough grassy path next to the River Muga. We tied the Lento box to the tree and angled it. The river is flowing from right to left of scene, about seven or so strides in front. Beyond the landscape rises steeply. Up through dense trees and woodland, and up to a horizon that seems unfeasibly high, marked with dramatic mountain peaks.
The Lento box recorded alone. Captured a scene of almost constant rolling thunder and sparkling Pyrenees rain. The sky is free of human made noise, and with only one road connecting the village this area has a sound environment where the natural world is sometimes the only thing that can be heard.
** Support Radio Lento by buying us a coffee, leaving us a review or telling your friends / family / colleagues / network about the benefits of listening to quiet from a real place. - A soundscene of an island. Asleep. Between the tides.
This passage of time is from a 2025 recording the Lento box made in Bigbury-on-Sea, tied to a palm tree facing onto the beach and out towards the island.
It's the dead of night, 2am to 3am. The waves are breaking along the soft sandy beach. The tide has turned. Now it is rising. Weather conditions mild. Wind speeds very light, 1 to 2 knots. Human activity virtually nil for tens of miles, in all directions, including the entire dome of the night sky.
* What makes this overnight sound photograph of the beach by Burgh Island so precious to us is the crystal clarity of the waves and their movement as they break on the flat sands, under a silent night sky. Being the dead of night and completely dark herring gulls and oyster catchers are still occasionally audible, but their calls are relatively sparse and there are long empty gaps.
** You can listen to other sections of this overnight recording in episode 265 and episode 295. - As the land bakes under the hot August sun, the heat rises and so draws cooler air in from over the sea. The resulting breeze is always fresh, and can flow quite strongly even when it isn't windy anywhere else. And so this is how we found coolness yesterday and relief from the relentless sun, shaded under a patch of woodland that grows by the cliffs and the raging sea below.
Along the Suffolk coast a little way on from Felixstowe Ferry is Bawdsey. It's a largely uninhabited rural stretch of coast marked by a huge and now obsolete RADAR station that when we passed by yesterday was sadly not open to visitors. We were walking with purpose, hugging the rough edge of the country road heading roughly north and hoping to get to a Martello tower that we’d not visited before. The sun poured down its heat as we walked. So much of the open ground was yellow. The air smelled of bone dry shrubbery and sometimes of eucalyptus. The road stretched on before we eventually found a post directing us back to the coastal path towards the cliffs and the sea.
Through a field growing onions and then along a path with a wire fence on one side protecting a field with a squat looking structure in the middle. The map said it was a ventilation shaft for a subterranean military bunker that like the RADAR station is now also obsolete. Just before the path reached the edge of the cliffs it wound through a patch of woodland. Our footsteps crunching over pine needles and cones, we stood still to listen to the unique sounds that trees make as wind passes through their leaves and branches.
Onwards then along the winding path under the trees and out to a wide view of fields and the sea, the Martello tower in the distance. The soundscape here made us stop. Tall plants growing sweetcorn. Countless thousands of long slender leaves waving and rustling. Leaves so long they moved like streamers, tossed this way and that. Tangling and untangling in the breeze. This was the place. We found a tree at the edge of the woodland that looked onto the maize field, and left the Lento box to record. While it recorded we walked back into the woodland and rested for an hour under the kind cool trees.
* We are so happy to be sharing this special sound landscape recording as the 300th episode, made only yesterday on the Suffolk coast. We travelled entirely by foot (apart from the ferry across the River Deben), nodding to previous recording locations made early in our Lento adventures for episodes 25, 33 and 70 along the way. We were glad to be back in Suffolk for this milestone episode.
** Thank you for listening. Thank you to everyone who supports Radio Lento with donations, reviews and promotions. All your support helps us to continue to collect high definition spatial recordings from real natural places. - Night woodland. Sonorous owls. Soft nocturnal breezes catching high in the broad-leafed trees. A panoramic woodland in spatial sound, collected by the Lento box alone.
Always so fascinating to us is how the natural world sounds at night, when there's absolutely nobody about. It's quite difficult to record though in its true resting state because human made noise is audible even from distances of ten miles or more. But here on a calm May night in Big Wood on the Leicestershire-Rutland border the Lento box found it. A forest at rest. Owls calling across wide reverberant spaces. Undulating wind moving high in the trees. And so many aural shadows. Velvet brown, shapeless, and yet there.
Listening to this collected soundscape in spatial audio makes us think, how owls don't sound like they look. Their aural presence is not stark or silvery at all. Their calls are sonorous and have a timbre more like short wooden flutes, blown and tongued with such precision. They sound more golden than silver. The kind of golden green light you sometimes see when a shaft of moonlight filters down through broad leafed trees.
* The Lento box collected this soundscape in May tied to a tree in Big Wood on the Leicestershire- Rutland border. This location is remote (as far as we can get in the UK) and the sound landscape is predominantly natural, though some distant echoes of human made noise are sometimes heard filtering through the forest. We're sharing this segment as *sleep safe* but some people may not feel it is because of the owl calls. This segment begins about an hour after sunset. Sheep and lambs are audible, and some periods of distant squeaking probably from small mammals living in a nearby tree or in a nest at the foot of the tree.
** The image for this episode is taken from the information board at the entrance to the wood. The wood is managed by the Leicestershire and Rutland Wildlife Trust. The board describes special plants and insects found there, with lovely illustrations.
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