Pressure gradient and Phase - Amplitude sound field quantity pound pressure gradient receiver pressure omni-directional figure-of-eight - sengpielaudio
Deutsche Version UK-flag s/w - sengpielaudio D-flag - sengpielaudio
● The pressure gradient and the phase
Fact: The pressure gradient is ahead of the sound pressure at 90°.
Phase of the S signal at the microphone with figure-eight pattern in
opposite to the M signal at the microphone with omni-directional pattern?

See: "Soundfield Quantities of a Plane Wave The Amplitudes":
When looking at the curves of displacement, sound pressure, sound velocity and pressure gradient there comes a question:
If the pressure gradient is always 90° ahead to the sound pressure, why is MS stereophony with an omni-directional pressure microphone and a pressure gradient figure-of-eight microphone no problem?
The frequency response of the pressure gradient increases with frequency at 6 dB/octave. To compensate for this, these microphones are "tuned damped". In the electrical analogy,this represents an RC pad above its transition frequency causes a drop of 6 dB/octave, and shifts the phase constant at −90°. In the whole area in which the "pressure gradient figure-of-eight microphone" has a constant frequency response, thus, the phase is equal to the "pressure omni-directional microphone".

Druckgradient und Druck sengpielaudio

"Schallschnelle und Druckgradient sind nicht das Gleiche":
"Mechanische Abstimmung von Mikrofonen 1 - Schall-Druckempfänger
"Mechanische Abstimmung von Mikrofonen 2 - Schall-Druckgradientenempfänger
"Membranabstimmung des Mikrofons (Mikrofonabstimmung) - Wikipedia"
"State of the membrane resonance in dynamic microphones and condenser microphones"
Not only take something from this website to enhance your knowledge.
Please, also give some feedback to the author to improve the performance.
next weiter Search Engine zurück home Start