I had to measure low frequency sounds from the tenant above me (he was using a sub-woofer that sat on the floor). The NIOSH SLM app measures both regular and low -frequency sounds. It's supposed to be quite accurate--per sound engineer. Highly recommend it. apps.apple.com/us/app/niosh...
I had to measure low frequency sounds from the tenant above me (he was using a sub-woofer that sat on the floor). The NIOSH SLM app measures both regular and low -frequency sounds. It's supposed to be quite accurate--per sound engineer. Highly recommend it. apps.apple.com/us/app/niosh...