Islanders in the Outer Hebrides are reportedly being disturbed a mysterious low-frequency humming sound that can heard in the day and night. 

Around 200 people in Lewis have reported hearing the noise, which locals say is “impossible to ignore” and is louder nearer the coast of the island.   

A spokesperson for the local authority said: “As with any other reports of this nature, the comhairle’s environmental health team is investigating and will liaise with those who have reported issues.” 

Kirtley said the hum could be heard across Lewis and that it was less noticeable in the centre of the island and strongest on the east coast. 

She added that the Hebridean Hum had been recorded at a low frequency of 50hz. 

“It is a very low, humming, droning, pulsating noise. It’s incredibly intrusive and distressing,” she said.  

McGowan, who said he is determined to find the source of the mysterious hum, has ruled out SSEN’s Battery Point Power Station in Stornoway and also believes it was unlikely to be coming from boats. 

The power station on the island is only operated at certain times, while the hum has been reported as a constant problem.