In this guide01Low frequencies reveal movement limits02Voice frequencies reveal everyday clarity03High frequencies depend on hearing too04Sweeps are diagnostics, not measurements
Low frequencies reveal movement limits
Small phone speakers reproduce deep bass weakly by design. Buzzing or rattling can be useful evidence, but quiet bass alone is not failure.
Voice frequencies reveal everyday clarity
The middle range carries much of speech. A smooth, clean voice-range test is often more practical than extreme low or high tones.
High frequencies depend on hearing too
Age, environment and hearing sensitivity affect what you notice. Do not raise volume to chase a high tone you cannot hear.
Sweeps are diagnostics, not measurements
A browser sweep can reveal obvious dropouts and distortion. It is not a calibrated laboratory frequency-response test and cannot certify repairs.
The short answer
A browser sweep can reveal obvious dropouts and distortion. It is not a calibrated laboratory frequency-response test and cannot certify repairs.