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2. Sound level meter - Wikipedia

   en.wikipedia.org/wiki/Sound_level_meter

   A sound level meter (also called sound pressure level meter (SPL)) is used for acoustic measurements. It is commonly a hand-held instrument with a microphone . The best type of microphone for sound level meters is the condenser microphone, which combines precision with stability and reliability. [ 1 ]

3. Frequency meter - Wikipedia

   en.wikipedia.org/wiki/Frequency_meter

   One of the most basic forms of frequency meter is the vibrating reed meter or tuned reed meter. This consists of an electromagnet coil carrying the signal positioned near the end of a tuned metal reed or tuning fork-type arrangement. As the signal travels through the coil it creates a magnetic field with the sample frequency, which pushes and ...

4. Spectrum analyzer - Wikipedia

   en.wikipedia.org/wiki/Spectrum_analyzer

   Spectrum analyzers are also used by audio engineers to assess their work. In these applications, the spectrum analyzer will show volume levels of frequency bands across the typical range of human hearing, rather than displaying a wave. In live sound applications, engineers can use them to pinpoint feedback.

5. Audio system measurements - Wikipedia

   en.wikipedia.org/wiki/Audio_system_measurements

   A component having a flat frequency response will reproduce content at all frequencies across the specified frequency range at the same intensity. The frequency range often specified for audio components is between 20 Hz to 20 kHz, which broadly reflects the human hearing range.

6. Frequency counter - Wikipedia

   en.wikipedia.org/wiki/Frequency_counter

   A frequency counter is an electronic instrument, or component of one, that is used for measuring frequency. Frequency counters usually measure the number of cycles of oscillation or pulses per second in a periodic electronic signal. Such an instrument is sometimes called a cymometer, particularly one of Chinese manufacture. [citation needed]

7. Noise dosimeter - Wikipedia

   en.wikipedia.org/wiki/Noise_dosimeter

   Frequency weighting: A-weighting or C-weighting Exponential averaging: F (fast); S (slow) Criterion level: 90, 85, 84, 80, or V (variable) Criterion duration: Hours Threshold level: 90, 80, or V (variable) Exchange rate: 5, 4, or 3 A noise or sound dose is the amount of sound a person is exposed to in a day. The dose is represented by a percentage.

8. Peak programme meter - Wikipedia

   en.wikipedia.org/wiki/Peak_programme_meter

   A peak programme meter (PPM) is an instrument used in professional audio that indicates the level of an audio signal. Different kinds of PPM fall into broad categories: True peak programme meter. This shows the peak level of the waveform no matter how brief its duration. Quasi peak programme meter (QPPM). This only shows the true level of the ...

9. A-weighting - Wikipedia

   en.wikipedia.org/wiki/A-weighting

   A graph of the A-, B-, C- and D-weightings across the frequency range 10 Hz – 20 kHz Video illustrating A-weighting by analyzing a sine sweep (contains audio). A-weighting is a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. [1]