Psophometer from Canada
Psophometers measure weighted noise in telephone circuits using the psophometric curve for standardized audio assessment. Specifically listed under HTS 9030.40.00.00 for telecommunications noise measurement.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Reference ITU-T O.41 standard in documentation to substantiate telecom classification
• Calibrate to international standards before import to prevent disputes