Dinosaur sounds/vocalization

[sauroid]

are there any studies regarding this? i seriously doubt that very large carnivorous theropods made growling screams like in the movies. perhaps amplified birdlike vocal patterns (sort of like "barking" calls)? small species have been depicted in documentaries as birdlike in their vocalization (chirping/cooing/etc.)...

[Gwangi]

I highly doubt it, roaring dinosaurs are here to stay I'm afraid no matter how unlikely. In the context of entertainment I don't mind it, the T. rex roar from "Jurassic Park" for example was simply bone-chilling the first time I heard it.

[laticauda]

We all love the roars that we have heard in the movies, unfortuatly, they are made up sounds for the films.  It is possible many didn't make any sounds, hence, one of the needs for crests, bright colors, and who knows, maybe to change color like a squid for communication.  I am sure that there were many different ways for different dinosaurus to communicate. I sure there was some hissing, gator growling, and some sort of bellowing at some point with some species.

Here is a link to a simple article from the smithsonian.    http://www.smithsonianmag.com/science-nature/did-dinosaurs-roar-48438337/?no-ist

[Arul]

Sound made of some combination, air from lung, vibration from plica vocalis, tongue, and resonance by sinus cavum in cranial. maybe we can compare dinosaur sound to modern reptile or modern bird ? Maybe they can chirping, chattering, growling, barking, hissing, but i cant imagine if a dinosaur can sing like modern bird 

[Halichoeres]

There are some studies on hadrosaurs. David Weishampel has written a few papers on hadrosaur vocalizations (for example http://www.jstor.org/stable/1313034?seq=1#page_scan_tab_contents), but that's only possible because we have a good impression of the resonating chamber of Parasaurolophus. All modern birds have a syrinx, which influences the range of sounds they're able to make, but I'm not sure if we know anything about vocalization structures in more ancient theropods. And even a bird syrinx can produce a bellow (bustard, ostrich) or a tweet, depending on size. But we can have a pretty good idea what Parasaurolophus sounded like!

https://www.youtube.com/watch?v=QtpSOpUDCb8

(Although I must say it sounds like the upper register of a trombone)

[sauroid]

cool feedback guys, but i think i made a mistake of postng this thread here. (should have been in the palaeontology section)

[DinoLord]

I've been volunteering on a chicken farm lately, and you'd be surprised at the variety of sounds they can make, from crows to chirps to outright shrieks. IMO the sounds JP came up with for the smaller theropods seem pretty plausible to me.

[Brachiosaurus]

I was watching a documentary on youtube yesterday, it was dinosaur planet or something, that even said that carnivorous dinosaurs most likely sounded like modern bird, crocodiles, or a mixture of both.

[Tyto_Theropod]

The wonderful Dr Darren Naish actually wrote a post about this topic on Tetrapod Zoology, but unfortunately I can't seem to find it. He argued that until direct evidence for sirynx/larynx structures is unearthed (Aerosteon being an exception), and with the huge number of probable display structures preserved, we can speculate that dinosaurs relied more on visual communication, and that it was perfectly possible that they could have made sounds without the need for a larynx or sirynx - e.g. hissing, drumming and clacking jaws together, all seen in modern archosaurs and/or birds.

[spinosaurus1]

i remember tlking about this on another forum. heres a quote of what i typed.

crocodilians are both vocal and social as well as being close to dinosaurs phylogenetically. not all dinosaurs have syrinxs, which is one of the reason why birds can various vocals such as chirping. it's only later on that such trait has evolved . compare this to crocodilians, who don't have a syrinxs and yet capable of producing large range of vocal communication. i imagine mid- sized to large theropods sounding reminiscent to upscale crocodiles. capable of hissing, coughing, and bellowing.

if i recall correctly, cassowaries also don't have a syrinxs, and yet they can make some of the deepest vocals out of any bird and can sound terrifying as well. i see them sounding like a mix between crocodilians and some primative birds we se today.

[Halichoeres]

if i recall correctly, cassowaries also don't have a syrinxs, and yet they can make some of the deepest vocals out of any bird and can sound terrifying as well. i see them sounding like a mix between crocodilians and some primative birds we se today.

I looked that up, and you're right! I didn't know that about cassowaries. Especially odd since rheas and ostriches have them.

[Tyto_Theropod]

This prompted me to do a google search for recordings of cassowary calls. Just listen to these! They make you feel like you're standing in a Cretaceous forest. All right, romantic description aside, I do feel these are very 'dinosaur-y' sort of noises. Some of them sound almost reptilian.

https://www.youtube.com/watch?v=4dcQO6Zb8Eg

[HD-man]

Here is a link to a simple article from the smithsonian.    http://www.smithsonianmag.com/science-nature/did-dinosaurs-roar-48438337/?no-ist

The wonderful Dr Darren Naish actually wrote a post about this topic on Tetrapod Zoology, but unfortunately I can't seem to find it. He argued that until direct evidence for sirynx/larynx structures is unearthed (Aerosteon being an exception), and with the huge number of probable display structures preserved, we can speculate that dinosaurs relied more on visual communication, and that it was perfectly possible that they could have made sounds without the need for a larynx or sirynx - e.g. hissing, drumming and clacking jaws together, all seen in modern archosaurs and/or birds.

Quoting Albertonykus ( http://albertonykus.blogspot.com/2011/03/singing-raptors-addendum.html ):

Fans of vocalizing (non-ornithothoracine) dinosaurs, rejoice! There is still a ray of hope. According to a new comment Dr. Naish has just made on my post about dinosaur vocalization, it turns out that neornithines also use the larynx for vocalization in addition to the syrinx (contrary to older studies), meaning that the common ancestor of crocodilians and neornithines probably had some form of laryngeal vocalization. So non-ornithothoracine dinos may have been able to vocalize after all.

[tanystropheus]

This prompted me to do a google search for recordings of cassowary calls. Just listen to these! They make you feel like you're standing in a Cretaceous forest. All right, romantic description aside, I do feel these are very 'dinosaur-y' sort of noises. Some of them sound almost reptilian.

https://www.youtube.com/watch?v=4dcQO6Zb8Eg

That does indeed sound dinosaur-y 
I would imagine that hadrosaurs would make bellowing sounds due to the elaborate crest/nasal structures. Perhaps, they sound like whales?
I wonder if T-rex chirps or produce bird "songs"? How about mimicking?

[Plasticbeast95]

There's really nothing going against them roaring. We still don't know everything about living animal vocalizations (the long standing mute giraffe myth) so I really don't think we should be jumping to conclusions about Dinosaur vocalizations.