It's a film in which the mere arrival of birdsong on the soundtrack is as a narrative event but there are rewards for the patient; even those easily bored should leave the cinema feeling soothed.

Anyone caught trying to smuggle in popcorn should obviously be taken outside and shot - using a noise suppressor, preferably.

Think of Brian De Palma's Blow Out, then imagine it re-filmed by a team of Trappist monks.

The best cinematic portrayal of a man recording silence since that scene in 24 Hour Party People.

An immersive and creative appreciation of the Irish landscape, culture and language as shown by sound recordings of environments untouched by man-made noise, archive footage and frank dinner table discussion.

Even if filmmakers have trodden similar paths on other parts of the planet - Iran, for instance - and though a little patience is required, Collins draws you in with the suggestive power of hush.

Enigmatic and rewarding.

Pacific Rim it ain't, but this docu-like curio offers tranquility in spades. An aural bath of a film that will soothe troubled minds.

Closer to Abbas Kiarostami (Like Someone In Love) than Berberian Sound Studio, it's a lyrical if emotionally muted journey.