Rattling Sound from front- Sound captured from inside bonnet

[abhijith]

Hi, I recently bought a Honda Jazz 2013 model which has run for 105k miles. While driving I hear a metal rattling sound in 3rd, 4th, 5th gears, only at certain rpm like 2000 where it feels like there is some load on the engine. I have no idea where the sound is coming from as it's not there while the car is not running even if I rev the engine. The mechanic also couldn't spot the reason.

I put my phone inside the bonnet and then drove the car to capture the sound. Attached is the sound capture from inside the bonnet. In 4th gear I rev the engine in intervals to capture the sound.

Can anyone please help me spot where the sound comes from?

[Marco1979]

I once had a similar sound on my mk3 Jazz. One of the airconditioning metal tubes vibrated; one of the mounts did not fit entirely. It took some time to find out exactly where.

[embee]

There are several reports of heatshield rattles on various cars, sounds rather like that to me. They nearly always tend to be resonant, i.e. it will happen at certain frequencies which correspond to fairly well defined engine speeds. As the rpm increase there's nothing at first and then quite abruptly you get to resonance and the rattle gets very pronounced. It often then decreases again as rpm get higher and can disappear altogether.
There's a link to a video on here somewhere quite recently where the chap in a workshop shows exactly what it is. Someone will point you to it I'm sure.

[ianhj]

Is this the video clip?

Looks to be a common source of noise. Probably worth checking on our older cars.