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%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Reference ITU-T O.41 standard in documentation to substantiate telecom classification
• Calibrate to international standards before import to prevent disputes