Dynaudio pmn manual Background Info Acoustics, Standing Waves

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BACKGROUND INFO - ACOUSTICS

Standing Waves

Standing waves exist in all kind of rooms. The shape of the room, the dimensions of the room, and the relationship between the dimensions of the room, are important parameters that will determine the frequencies around which the phenomenon exists as well as the distribution of these standing waves. But how do they occur?

Imagine a sound source. When the sound is emitted the sound wave will propagate in all directions if no obstacles in sight. This will of course happen with the speed of sound. Now, if the sound source is placed inside a room the sound wave will hit the boundaries of the room. If the boundaries consist of acoustically hard (reflective) surfaces, the sound is reflected. If the angle of incidence is

The sound field is initially radiated having a radial wave front but within a few reflections the sound field has obtained a plane wave front.

90º the sound will be reflected right back where it came from. Under certain circumstances the sound wave will meet itself again. For instance if the sound is reflected between to parallel walls. This becomes a problem, when the sound wave not only meets itself, but when it meets itself in phase. And this will happen when the distance between the walls is half a wavelength of the radiated sound wave. Or one whole wavelength - or 1½, 2, 2½ and so on.

This phenomenon is called standing waves. Actually the sound wave is not standing. But it is experienced like that because the sound pressure maxima and minima are positioned in fixed places in the room.

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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 OverviewGeneral Setup Procedure AIR Display & Setting UPSetting up Introduction 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 Other situations Close to wall / WallOn the bridge / Console 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 wavesPolarity PhaseLFE Gain Reverberation time AcousticsGood acoustics 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-oversCinema set-up Delaying Monitors LINE-UP & CalibrationAcoustic summation of audio signals Calibration of 5.1 in an ITU-775 arrangement How to measure the sound pressure?LINE-UP & Calibration Background Info Introduction Remote Control FeaturesAIR Remote 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 SlaveGeneral for all Products AIR Base-1 & AIR Base-2Room & Distance AIR Remote AIR Remote specsError messages etc Delay in System & Error Messages ETCAIR Certificate of ConformityCertificate Of Conformity # 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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