Ambient noise suppression

A system for suppressing ambient noise from a captured audio signal comprising:

• an ambient noise assessor stored in memory and executable by a processor to detect a parameter of a variable ambient noise source and determine a first power spectrum representing the variable ambient noise source based on the detected parameter, the first power spectrum being determined independent of the captured audio signal;
• a comparator stored in the memory and executable by the processor to:
• determine a second power spectrum representing the captured audio signal;
• and
• compare the first power spectrum to the second power spectrum to identify at least one frequency range where net power of the first power spectrum and net power of the second power spectrum satisfy relativity criteria;
• and
• a noise suppressor stored in the memory and executable by the processor to suppress the at least one identified frequency range of the captured audio signal by an amount linearly proportional to a ratio of the first power spectrum to the second power spectrum.

One or more storage devices encoding computer-executable instructions for executing on a computer system a computer process for suppressing ambient noise from a captured audio signal, the computer process comprising:

• detecting a parameter of a variable ambient noise source;
• determining a first power spectrum representing the variable ambient noise source based on the detected parameter, the first power spectrum being determined independent of the captured audio signal;
• determining a second power spectrum representing the captured audio signal;
• comparing the first power spectrum to the second power spectrum to identify at least one frequency range where net power of the first power spectrum and net power of the second power spectrum satisfy relativity criteria;
• and
• suppressing the at least one identified frequency range of the captured audio signal by an amount linearly proportional to a ratio of the first power spectrum to the second power spectrum.