Frequently Asked Questions
- Do I really have to move the microphone during measurement?
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Yes, keeping it still will produce wrong results! CONEQ requires collection of as many as 300 different measurement points to obtain the true Acoustic Power Frequency Response (APFR). During CONEQ measurement a test signal is played back repeatedly and by moving the microphone you ensure that every test signal is recorded at a different position.
- At what distance from the speakers should I measure?
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As a rule of thumb you measure at a distance that is at least the size of the loudspeaker cabinet. If the loudspeaker is positioned near a sound-reflecting surface (e.g. floor) then the previously mentioned measurement distance should be increased by the distance from loudspeaker to that surface.
- What is the area I should cover during measurement?
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You should cover the typical coverage area of the loudspeaker. That is a segment of space in front of the loudspeaker in which the frequency response of the loudspeaker is nominal. The width (both horizontal and vertical) depend on the construction of the loudspeaker and sometimes is given in the technical specification. If there is a nearby sound-reflecting surface (e.g. floor) then the measurement area should be extended up to that surface to fully record also the reflected sound.
- Rooms cannot be corrected by any equalization of the audio signal! How can this work?
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Agreed! CONEQ is not a room correction system. CONEQ is about correcting loudspeakers. The principle of CONEQ is to make loudspeakers emit the same acoustic energy into the room as would be emitted by the original sound source. If you play recorded violin through a CONEQ-corrected loudspeaker in a subway station, it should sound like a violinist playing in a subway station and not like a violinist playing in a concert hall or anywhere else.
- Who is using CONEQ?
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Real Sound Lab has a goal of making CONEQ the standard for faithful sound capture and reproduction along every path the sound travels from the original source to the ears of the listener. Thus, CONEQ is used in sound recording studios, rental companies, theatres, houses of worship, stadiums, as well as growing number of consumer electronics products (TVs, home stereos, etc.).
- Can I try it myself?
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Use CONEQ Demo from here.
- What microphone should I use?
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For precise measurement an omni-directional measurement microphone is required. For evaluating the technology by using the CONEQ Demo application any condenser microphone with more or less flat frequency response is usable. Dynamic microphones tend to deviate too much from the flat frequency response. Expect very wrong results if using cheap Internet headset microphones.
- Can I measure and correct a 5.1/7.1 system?
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Yes, you can! CONEQ measurement is taken for one channel at a time and correction is applied to each channel separately. With the current CONEQ Demo application you can only measure and correct a stereo system, but that is not a limitation for the commercial software or hardware.
- I have measured my system but the bass became weaker and mids to highs became aggressive. Why is that?
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There are two possible reasons for that feeling. Firstly, the bass (or some part of it) might have been too high initially and is now properly taken away. Secondly, it might be the directivity of the speakers – high frequencies are thrown more to the front of the speakers and less to the sides. If both sides and the centre are covered by the measurement, then the measurement can show too little high frequencies being present, and the correction filter will unnecessary boost the high frequencies.
If you cannot find the answer to your question in our FAQ, please see what our other visitors have asked us at Forum!
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