Dynaudio pmn manual Comb Filtering

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ACOUSTICS - BACKGROUND INFO

Comb Filtering

The filtering function that arises when a signal is added to itself after having been delayed in time is called a comb filter. The resulting frequency response resembles a comb, hence the name.

Two 500 Hz sinusoidal tones added. The second tone is delayed 1 ms hence the sum is zero

Two 1 kHz sinusoidal tones added. The second tone is delayed 1 ms hence the sum is the double (+6 dB).

The comb filter function is almost never intentional, but it is heard all the time in sound productions, where it can arise both acoustically and electrically.

Acoustically, it typically occurs when the sound on its way from source to recipient takes in part a direct path and in part an indirect path via a single reflective surface. The reflection must be attenuated at least 10 dB and preferably 15 dB in order for it not to have an effect on the sound field at the recipient position. Electrically, the phenomenon arises when two microphones with a certain distance between them capture the same signal and the level from each microphone is of the same order of magnitude.

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Contents AirUSrev111.qxd 16-12-2004 1414 AirUSrev111.qxd 16-12-2004 1414 Voltage Line plug according to standard Important Safety InstructionsQuick Setup Reference AirUSrev111.qxd 16-12-2004 1415 Page c Table of Contents Product Concept IntroductionThis Manual BreakSlave & Sub Units Remote ControlCommon Features Master UnitOptional Digital I/O card Rear Panel Description MasterMaster Unit Analog I/O Slave/SubMain Display Operational OverviewAIR Display & Setting UP Setting up IntroductionGeneral Setup Procedure Stereo Setup with stereo Subs SetupsStereo Setup Stereo Setup with mono SubsThis illustration shows how to connect a 5.1 analog setup Digital SetupAnalog Setup This illustration shows how to connect a 5.1 digital setupThis illustration shows how to connect a 5.3 Analog setup This illustration shows how to connect a 5.3 Digital setupDig/6 Master This illustration shows how to connect a 6.1 Analog setupOther Chained Setups Stereo Setup With Chains on L & RDigital 192 kHz Digital Setup Overview When the Monitors are ConnectedMain Display Press Enter to access the Select ModeParameter Description Basic operation in all menusExternal Clock Setup MenuSetup Set Monitor TaskStore Presets In GeneralLFE channel note RecallPlacing the Monitors Close to wall / Wall On the bridge / ConsoleOther situations Checking the placing Phase checkingChecking by ear when listening to the signals In phase EvaluationNext EqualizingAcoustic level calibration Calibrating Main MonitorsCurves Interchannel calibrationPlacing the Subwoofer Evaluation Low frequency sweepsChecking the Crosspoint Checking summing phase cancellationTo Calibrate Controlling standing wavesPhase LFE GainPolarity Acoustics Good acousticsReverberation time Sabines formula Absorbtion or diffusion ? Resonance absorbers AbsorbersDiffusers Membrane absorbersStanding Waves Background Info AcousticsAxial Tangential Radial Room modesHow does the standing waves influence the sound field? How to prohibit standing wavesAcoustics Background Info Comb Filtering Dip frequencies Or +Rear wall cancellation Subwoofer Subwoofer Background InfoLow Pass LFE Gain Subwoofer & LFE Channel Background InfoLFE Channel Cross-oversDelaying Monitors LINE-UP & Calibration Acoustic summation of audio signalsCinema set-up How to measure the sound pressure? LINE-UP & Calibration Background InfoCalibration of 5.1 in an ITU-775 arrangement Remote Control Features AIR RemoteIntroduction Shift key Preset 1/3 and 2/4 keysVolume potentiometer REF Level 1-3 keysNavigating AIR Soft AIR SoftTools MainNetwork Preset ListSystem Setup Chained monitors Calibrate AIR BaseLocal Parameters Reset ProceduresMiscellaneous Global ParametersSerial to Cat-5 cable CablesTC Link Standard Cat-5 cables AES/EBU Standard cablesAIR 20 & AIR 25 Master and Slave AIR 6 & AIR 15 Master and SlaveAIR Base-1 & AIR Base-2 Room & DistanceGeneral for all Products AIR Remote AIR Remote specsError messages etc Delay in System & Error Messages ETCCertificate of Conformity Certificate Of ConformityAIR # Name Preset List

pmn specifications

Dynaudio, a company renowned for its high-fidelity audio products, has made significant strides in the field of professional monitoring through its PPM (Professional Precision Monitoring) series. Among the standout models in this series is the Dynaudio PMN (Professional Monitoring Nearfield), which has garnered attention for its outstanding sound quality, precise technical performance, and sophisticated design.

One of the key features of the Dynaudio PMN monitors is their advanced driver technology. Equipped with proprietary drivers, the PMN series employs custom-designed woofers and tweeters that deliver an incredibly accurate frequency response. The woofers utilize a lightweight diaphragm, ensuring that low frequencies are produced with power while maintaining clarity. The tweeters, known for their soft dome design, excel in reproducing high frequencies with exquisite detail and minimal distortion, making the listening experience both immersive and enjoyable.

In terms of design, the PMN monitors boast a sleek and modern aesthetic that fits seamlessly into any studio environment. The cabinet construction employs advanced materials and techniques that minimize resonance, thus reducing unwanted coloration in sound. The unique curved shape of the cabinets is not only visually appealing but also supports optimal acoustic performance by enhancing sound dispersion.

Another notable characteristic of the Dynaudio PMN is its versatility. The monitors are equipped with multiple inputs, allowing for seamless integration into various set-ups, whether in a professional studio or a home listening environment. This flexibility is further complemented by adjustable bass and treble controls, empowering users to tailor the sound profile to their specific requirements.

Dynaudio has also incorporated advanced technologies such as room correction in certain PMN models, which enables precise calibration according to the acoustics of the room. This feature ensures that audio professionals can rely on consistent and accurate sound reproduction regardless of their monitoring environment.

Overall, the Dynaudio PMN series represents a blend of pioneering audio technology, meticulous craftsmanship, and user-focused design. For professionals seeking precise monitoring solutions for music production, film scoring, or any audio-related projects, the Dynaudio PMN monitors provide an exceptional listening experience that stands the test of time. With their stellar performance and innovative features, these monitors have become a top choice for sound engineers, musicians, and audio enthusiasts alike.
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