As long as you know the amplitude tolerance (+/- 3dB), the frequency response range or width tells you how high or low the speaker goes. A speaker rated as 20Hz â 25kHz +/- 3dB will play lower bass and higher treble sounds than a speaker that measures 40Hz â 20kHz +/- 3dB.requency Response In Context. A big improvement would be a frequency response number that also includes the amplitude tolerance, expressed as âXHz-YkHz +/- 3dB.â This tells you that the amplitude of the speakerâs response relative to frequency does not deviate more than 3 Decibels from the center line.
1 Pepsin is the main gastric enzyme. 2  It is produced by the stomach cells called chief cells in its inactive form pepsinogen, which is a zymogen. 3  Pepsinogen is then activated by the stomach acid into its active form, pepsin.here are four types of cells in the stomach: 1  Parietal cells: Produce hydrochloric acid and intrinsic factor. 2  Gastric chief cells: Produce pepsinogen. 3  Chief cells are mainly found in the body of stomach, which is the middle or superior anatomic portion of the stomach.
1 Pepsin is the main gastric enzyme. 2  It is produced by the stomach cells called chief cells in its inactive form pepsinogen, which is a zymogen. 3  Pepsinogen is then activated by the stomach acid into its active form, pepsin.here are four types of cells in the stomach: 1  Parietal cells: Produce hydrochloric acid and intrinsic factor. 2  Gastric chief cells: Produce pepsinogen. 3  Chief cells are mainly found in the body of stomach, which is the middle or superior anatomic portion of the stomach.