The frequency range over which an audio device or system will produce or reproduce a signal within a certain tolerance, such as + – dB. Microphones are supplied with a manufacturer’s frequency range test report, which gives a visual reference for the particular microphone’s sensitivity to a given range. Sensitivity to the higher frequencies is more significant than ideal flat response overall since much of the highs are lost in further sound processing.
"Just a short note to thank you for the wonderful job you did transferring my old cassette of Japanese koto music to CD. I haven't be able to find a CD version of this tape in Japan and had stopped playing it to avoid wearing it out. Within days of sending it to you I received back an excellent CD of this beloved tape at a very low cost. Thanks ..."