Magnet voice
Author: s | 2025-04-24
The neodymium speaker magnet produces a magnetic field, and the speaker's voice coil motor is placed in the magnetic field. When the voice coil passes through the audio
Magnet Voice Communicator - Magnet Plus
Innovation in Linear Motion This moving magnet actuator (NCM02-05-005-4JB) comes supplied with an integrated synthetic jewel linear bearing, which has been selected especially for the usage with this actuator. Moving magnet actuators come standard with a linear bearing system. If you would like to see these actuators without a built-in bearing system please look at our moving coil models. Or if you would like to see how we have integrated our moving magnet voice coils into closed loop positioning stages please look at our voice coil positioning stages.To determine your motion profile needs, use our linear motion calculator. Device TypeMoving Magnet Stroke0.15 in3.8 mmBearing TypeJeweled Bushings Moving Mass0.42 oz12.0 gramsTotal Mass1.7 oz49.0 gramsResistance @ 20C3.5 ohmsInductance @ 20C0.25 mHElectrical Time Constant0.07 msecMotor Constant0.38 lbs/√watt1.7 N/√wattForce Constant0.72 lbs/amp3.2 N/ampBack EMF0.08 V/ips3.2 V/m/secForce @ 100% Duty0.50 lbs2.2 NPower @ 100% Duty2.0 wattsCurrent @ 100% Duty0.8 ampsForce @ 10% Duty1.5 lbs6.7 NPower @ 10% Duty16.0 wattsCurrent @ 10% Duty2.4 ampsOutside Diameter0.52 in13.2 mmHousing Length1.7 in42.4 mm Product Drawing Request A Quote Comments & Special Instructions:
What is The Magnetic Voice?
Faster heat dissipation. Drivers Magico Nano-Tec drivers exercise absolute control over voice coil movement by providing underhung voice coils in a magnetic circuit of tremendous power. Uncommonly large Neodymium ring magnets with 16 times the magnetic energy per unit volume of Ferrite form the motor system. An extra measure against asymmetry, the drivers deploy a matching magnet on top which enables distortion-free output up to 120 dB SPL at 1 meter. The new 6-inch midrange (x1) features a 3-inch voice coil to help maintain linear output all the way to 120 dB SPL at 1 meter. This results in unmeasurably low distortion throughout the driver’s operating range. The new 11-inch mid bass driver (x2) features a 4-inch voice coil with a N48H grade Neodymium ring magnet of unusual size: 120 mm diameter x 8 mm height, plus a second matching magnet on top for complete control of voice coil movement. The new 15-inch bass driver (x2) features a 5-inch voice coil with an uncommonly long 36 mm air gap that facilitates tremendous linear excursion, ±15 mm, at high sensitivity. The M9 drivers represent true state of the art and are the most advanced dynamic driver designs ever offered by Magico. Crossover The new Magico Analog Crossover (MXO) was designed in-house from our own platform to manage the crossover frequency between the 15-inch bass and 11-inch mid-bass drivers. At such a low frequency, a passive crossover would require huge inductors and capacitors which would incur substantial losses. The meticulous design of the MXO has fully balanced and discrete circuit topology with Linkwitz-Riley filters to deliver steep 24 dB per octave slopes at the crossover frequency of 120 Hz. Precision step attenuators provide 0.5 dB/step control of each output, using a proprietary technique to ensure purity in the signal path. Open architectureYour User Portal - Magnet Voice - Magnet
SmartphoneYesSIM SizeNano Sim + eSIMGraphics PPI460 PPISensorsFace ID, LiDAR Scanner, Barometer, High Dynamic Range Gyro, High-G Accelerometer, Proximity Sensor, Dual Ambient Light SensorsSupported LanguagesEnglish (Australia, UK, US), Chinese (Simplified, Traditional, Traditional - Hong Kong), French (Canada, France), German, Italian, Japanese, Korean, Spanish (Latin America, Spain), Arabic, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Finnish, Greek, Hebrew, Hindi, Hungarian, Indonesian, Kazakh, Malay, Norwegian, Polish, Portuguese (Brazil, Portugal), Romanian, Russian, Slovak, Swedish, Thai, Turkish, Ukrainian, VietnameseBrowserSafariOther FeaturesTitanium Design, Ceramic Shield Front, Textured Matt Glass Back, Rated IP68 (Maximum Depth of 6 Metres Upto 30 Minutes) Under IEC standard 60529, New 16 Core Neural Engine, Enabled by TrueDepth Camera for Facial Recognition, Apple Pay, Emergency SOS via Satellite, Crash Detection, 5G (sub 6 GHz) with 4x4 MIMO, Gigabit LTE with 4x4 MIMO and LAA, 2x2 MIMO, Second Generation Ultra Wideband Chip, Thread Networking Technology, NFC with Reader Mode, Express Cards with Power Reserve, FaceTime Video Calling Over Wi Fi or a Mobile Network, FaceTime HD (1080p) Video Calling Over 5G or Wi Fi, Share Experiences Like Movies, TV, Music and Other Apps in a FaceTime Call With SharePlay, Screen Sharing, Portrait Mode in FaceTime Video, Spatial Audio, Voice Isolation and Wide Spectrum Microphone Modes, Optical Zoom with Rear Facing Camera, FaceTime Audio, Voice Over LTE (VoLTE), Wi Fi Calling, Spatial Audio Playback, User Configurable Maximum Volume Limit, Supported Formats Include HEVC, H.264 and ProRes, HDR with Dolby Vision, HDR10 and HLG, Upto 4K HDR AirPlay for Mirroring, Photos and Video Out to Apple TV (2nd Generation or Later) or AirPlay Enabled Smart TV, Video Mirroring and Video Out Support: Upto 4K HDR Through Native DisplayPort Output Over USB-C or USB-C Digital AV Adapter (Model A2119, Adapter Sold Separately), USB C Connector with Support For: Charging, DisplayPort, USB 3 (Upto 10Gb/s), Built-in Rechargeable Lithium ion Battery, MagSafe Wireless Charging Upto 15W, Qi wireless Charging Upto 7.5W, Fast Charge Capable: Upto 50% Charge in around 30 Minutes, With 20W Adapter or Higher (Available Separately), MagSafe: Magnet Array, Alignment Magnet, Accessory Identification NFC, Magnetometer, Accessibility: VoiceOver, Zoom, Magnifier, Voice Control, Switch Control, AssistiveTouch, RTT and Textphone Support,. The neodymium speaker magnet produces a magnetic field, and the speaker's voice coil motor is placed in the magnetic field. When the voice coil passes through the audio Executive Handset Quick Reference Guide – Magnet Voice Android App Installation – Magnet Voice . Get in TouchAndroid App Installation - Magnet Voice - Magnet
Innovation in Linear Motion H2W introduces its most compact moving magnet actuator with a hole through the shaft. The voice coil actuator can be operated under either open or closed loop position control and is ideal for controlled sinusoidal motion applications (1 to 1000 Hz for open loop applications and 1 to 125 Hz for closed loop applications). The NCM moving magnet type linear actuator has a precision ground 0.125” diameter shaft that is guided by precision manufactured high cycle low-wear plastic bushings. The shaft has a 0.059” hole that goes through the shaft which is ideal for routing a fiber optic cable, passing light through, or routing an air hose for vacuum or pressurized air.The moving magnet voice coil has a 0.10" [2.5 mm] stroke, generates 0.1 lbs [0.5 N] of continuous force and 0.3 lbs [1.3 N] of peak force. The actuator is driven in open loop mode by feeding a sinusoidal control signal into a servo amplifier which is in turn connected to the two leads of the actuator.The actuator can also be operated as a closed loop system by adding a programmablemotion control and position feedback device.Features: High frequency operation High frequency operation Compact size Custom strokes and force configurations available Device TypeMoving Magnet Stroke0.1 in2.5 mmRadial ClearanceN/A inN/A mmBearing TypePlastic Sliding Contact Moving Mass0.04 oz1 gramsTotal Mass0.2 oz5.6 gramsResistance @ 20C2.8 ohmsInductance @ 20C0.1 mHElectrical Time Constant0.04 msecMotor Constant0.08 lbs/√watt0.34 N/√wattForce Constant0.13 lbs/amp0.56 N/ampBack EMF0.01 V/ips0.56 V/m/secForce @ 100% Duty0.1 lbs0.45 NPower @ 100% Duty2 wattsCurrent @ 100% Duty0.8 ampsForce @ 10% Duty0.3 lbs1.34 NPower @ 10% Duty16 wattsCurrent @ 10% Duty2.4 ampsOutside Diameter.4 in10.2 mmHousing Length.735 in18.7 mm Product Drawing Request A Quote Comments & Special Instructions:Executive Handset Specifications - Magnet Voice - Magnet
Digital Audio Voice Recorder 150 Days Voice Activated Recording This Digital Audio Voice Recorder has an internal 16GB (gigabyte) memory. The battery once fully charged, keeps this voice recorder powered fro 150 days on stand-by using the SVOS (Super Voice Operated Recording System) feature. 150 days of standby is based on the recorder being activated for approx. 1 hour a day. Busy audio environments may use the battery faster. about 30 days based on 4 hours of Audio recording per day. Digital Audio Voice RecorderCovert audio recording disguised as a portable chargeIt will charge phone and mobile devices while traveling or on-the-goUSB Flash Drive : 16GB memorySuper Voice Operated Recording System(SVOS) for max 150 daysSVOS level (sensitivity setting) user option (5 levels).Date and time stamp of the recordings.Hours of battery use on a single charge : 14 days(HQ standard) in continuous record up to 150 days in SVOS standby record.Recording Sound Quality Mode : HQ(64kbps) or XHQ(128kbps) User OptionRecording time : Memory 16GB HQ 576hrs XHQ 288hrs Magnet attachable/detachableMax no. of recording files : 9,999 filesCan be operated by external power supply like PC USB port or USB AC adapterALC function(Automatic Recording Level Control)Rechargeable battery : li-ion, 3.7V, 3000mAh charging time - PC/5 hrs, AC adapter ( not included) / 3 hrsHidden recording on/off switch, no LED flashing in recordingUSB 2.0 high speed upload & download / Plug-in & PlaybackBattery remains indication (LED is off in recording)Dimension & Weight : 93(W) × 27(H) × 23(D)mm / 75gPC O/S : Windows 2000, XP, Vista, 7, 8, 10Accessory : USB charging cable, Magnet, ManualDigital Voice Recorder & Cellphone Portable Charger (World's longest battery use : 150 days in SVOS recording (averaging 1 hour a day) Model No. : D1445Includes:16GB Battery Bank Voice RecorderUSB Connection CableMagnetInstructions This Digital Audio Voice Recorder has an internal 16GB (gigabyte) memory. The battery once fully charged, keeps this voice recorder powered fro 150 days on stand-by using the SVOS (Super Voice Operated Recording System) feature. 150 days of standby is based on the recorder being activated for approx. 1 hour a day. Busy audio environments may use the battery faster. about 30 days based on 4 hours of Audio recording per day. Digital Audio Voice RecorderCovert audio recording disguised as a portable chargeIt will charge phone and mobile devices while traveling or on-the-goUSB Flash Drive : 16GB memorySuper Voice Operated Recording System(SVOS) for max 150 daysSVOS level (sensitivity setting) user option (5 levels).Date and time stamp of the recordings.Hours of battery use on a single charge : 14 days(HQ standard) in continuous record up to 150 days in SVOS standby record.Recording Sound Quality Mode : HQ(64kbps) or XHQ(128kbps) User OptionRecording time : Memory 16GB HQ 576hrs XHQ 288hrs Magnet attachable/detachableMax no. of recording files : 9,999 filesCan be operated by external power supply like PC USB port or USB AC adapterALC function(Automatic Recording Level Control)Rechargeable battery : li-ion, 3.7V, 3000mAh charging time - PC/5 hrs, AC adapter ( not included) / 3 hrsHidden recording on/off switch, noiOS App Installation - Magnet Voice - Magnet
Current signal (high impedance) and puts out a low voltage, high current signal (low impedance). Typically about 320 volts of swing from the power tube plates flow into the output transformer primary and about 12 volts AC flows out the secondary through the blue wire to the speaker jack and on to the speaker.The speaker jack has a built in switch that grounds the output transformer's secondary when no speaker is plugged in. It does this because if you power up the amp with no speaker connected the output transformer will generate very high voltage in the secondary winding and fry itself if it sees an open circuit. The ground switch on the jack gives the transformer secondary a closed, short circuit which it can handle much better than an open circuit. Always have a speaker connected to a tube amp when you power it up. The aux jack is tied directly to the main speaker jack's tip and ground. Because of the main jack's ground switch you must have a speaker plugged into the main jack for the aux jack to function. You should use an 8 ohm aux speaker along with the cab speaker which will give the amp a 4 ohm load which Fender considers safe for the amp. A 4 ohm aux speaker will give the amp a too low load which will reduce output and stress the power tubes.From the speaker jack the signal moves on to the speaker. The alternating current audio signal flows through the speaker's voice coil which generates a magnetic field. The voice coil is simply a single wire wrapped into a coil as shown below. The magnetic field created by the voice coil is either attracted to or repelled by the speaker's magnet. Positive voltage in the voice coil generates a repulsive magnetic force and the speaker coil and cone moves outward away from the speaker magnet. Negative voltage generates an attractive magnetic force and pulls the speaker cone inward. The speaker cone alternates between moving outward and inward as the guitar signal voltage alternates between positive and negative.Speaker Voice Coil is an ElectromagnetElectric current flowing through the speaker's voice coil generates a magnetic field. When the audio signal electric current reverses the magnetic field also reverses causing attraction and repulsion to the speaker magnet.This in and out movement of the voice coil and speaker cone creates air pressure waves that our ears perceive as sound--the sweet sound of electric guitar. For every movement of a guitar string the amplifier generates a corresponding movement of the speaker cone. When the speaker cone moves outward a positive air pressure wave is created and when the cone moves inward a negative (low. The neodymium speaker magnet produces a magnetic field, and the speaker's voice coil motor is placed in the magnetic field. When the voice coil passes through the audioComments
Innovation in Linear Motion This moving magnet actuator (NCM02-05-005-4JB) comes supplied with an integrated synthetic jewel linear bearing, which has been selected especially for the usage with this actuator. Moving magnet actuators come standard with a linear bearing system. If you would like to see these actuators without a built-in bearing system please look at our moving coil models. Or if you would like to see how we have integrated our moving magnet voice coils into closed loop positioning stages please look at our voice coil positioning stages.To determine your motion profile needs, use our linear motion calculator. Device TypeMoving Magnet Stroke0.15 in3.8 mmBearing TypeJeweled Bushings Moving Mass0.42 oz12.0 gramsTotal Mass1.7 oz49.0 gramsResistance @ 20C3.5 ohmsInductance @ 20C0.25 mHElectrical Time Constant0.07 msecMotor Constant0.38 lbs/√watt1.7 N/√wattForce Constant0.72 lbs/amp3.2 N/ampBack EMF0.08 V/ips3.2 V/m/secForce @ 100% Duty0.50 lbs2.2 NPower @ 100% Duty2.0 wattsCurrent @ 100% Duty0.8 ampsForce @ 10% Duty1.5 lbs6.7 NPower @ 10% Duty16.0 wattsCurrent @ 10% Duty2.4 ampsOutside Diameter0.52 in13.2 mmHousing Length1.7 in42.4 mm Product Drawing Request A Quote Comments & Special Instructions:
2025-04-05Faster heat dissipation. Drivers Magico Nano-Tec drivers exercise absolute control over voice coil movement by providing underhung voice coils in a magnetic circuit of tremendous power. Uncommonly large Neodymium ring magnets with 16 times the magnetic energy per unit volume of Ferrite form the motor system. An extra measure against asymmetry, the drivers deploy a matching magnet on top which enables distortion-free output up to 120 dB SPL at 1 meter. The new 6-inch midrange (x1) features a 3-inch voice coil to help maintain linear output all the way to 120 dB SPL at 1 meter. This results in unmeasurably low distortion throughout the driver’s operating range. The new 11-inch mid bass driver (x2) features a 4-inch voice coil with a N48H grade Neodymium ring magnet of unusual size: 120 mm diameter x 8 mm height, plus a second matching magnet on top for complete control of voice coil movement. The new 15-inch bass driver (x2) features a 5-inch voice coil with an uncommonly long 36 mm air gap that facilitates tremendous linear excursion, ±15 mm, at high sensitivity. The M9 drivers represent true state of the art and are the most advanced dynamic driver designs ever offered by Magico. Crossover The new Magico Analog Crossover (MXO) was designed in-house from our own platform to manage the crossover frequency between the 15-inch bass and 11-inch mid-bass drivers. At such a low frequency, a passive crossover would require huge inductors and capacitors which would incur substantial losses. The meticulous design of the MXO has fully balanced and discrete circuit topology with Linkwitz-Riley filters to deliver steep 24 dB per octave slopes at the crossover frequency of 120 Hz. Precision step attenuators provide 0.5 dB/step control of each output, using a proprietary technique to ensure purity in the signal path. Open architecture
2025-04-17Innovation in Linear Motion H2W introduces its most compact moving magnet actuator with a hole through the shaft. The voice coil actuator can be operated under either open or closed loop position control and is ideal for controlled sinusoidal motion applications (1 to 1000 Hz for open loop applications and 1 to 125 Hz for closed loop applications). The NCM moving magnet type linear actuator has a precision ground 0.125” diameter shaft that is guided by precision manufactured high cycle low-wear plastic bushings. The shaft has a 0.059” hole that goes through the shaft which is ideal for routing a fiber optic cable, passing light through, or routing an air hose for vacuum or pressurized air.The moving magnet voice coil has a 0.10" [2.5 mm] stroke, generates 0.1 lbs [0.5 N] of continuous force and 0.3 lbs [1.3 N] of peak force. The actuator is driven in open loop mode by feeding a sinusoidal control signal into a servo amplifier which is in turn connected to the two leads of the actuator.The actuator can also be operated as a closed loop system by adding a programmablemotion control and position feedback device.Features: High frequency operation High frequency operation Compact size Custom strokes and force configurations available Device TypeMoving Magnet Stroke0.1 in2.5 mmRadial ClearanceN/A inN/A mmBearing TypePlastic Sliding Contact Moving Mass0.04 oz1 gramsTotal Mass0.2 oz5.6 gramsResistance @ 20C2.8 ohmsInductance @ 20C0.1 mHElectrical Time Constant0.04 msecMotor Constant0.08 lbs/√watt0.34 N/√wattForce Constant0.13 lbs/amp0.56 N/ampBack EMF0.01 V/ips0.56 V/m/secForce @ 100% Duty0.1 lbs0.45 NPower @ 100% Duty2 wattsCurrent @ 100% Duty0.8 ampsForce @ 10% Duty0.3 lbs1.34 NPower @ 10% Duty16 wattsCurrent @ 10% Duty2.4 ampsOutside Diameter.4 in10.2 mmHousing Length.735 in18.7 mm Product Drawing Request A Quote Comments & Special Instructions:
2025-04-16Digital Audio Voice Recorder 150 Days Voice Activated Recording This Digital Audio Voice Recorder has an internal 16GB (gigabyte) memory. The battery once fully charged, keeps this voice recorder powered fro 150 days on stand-by using the SVOS (Super Voice Operated Recording System) feature. 150 days of standby is based on the recorder being activated for approx. 1 hour a day. Busy audio environments may use the battery faster. about 30 days based on 4 hours of Audio recording per day. Digital Audio Voice RecorderCovert audio recording disguised as a portable chargeIt will charge phone and mobile devices while traveling or on-the-goUSB Flash Drive : 16GB memorySuper Voice Operated Recording System(SVOS) for max 150 daysSVOS level (sensitivity setting) user option (5 levels).Date and time stamp of the recordings.Hours of battery use on a single charge : 14 days(HQ standard) in continuous record up to 150 days in SVOS standby record.Recording Sound Quality Mode : HQ(64kbps) or XHQ(128kbps) User OptionRecording time : Memory 16GB HQ 576hrs XHQ 288hrs Magnet attachable/detachableMax no. of recording files : 9,999 filesCan be operated by external power supply like PC USB port or USB AC adapterALC function(Automatic Recording Level Control)Rechargeable battery : li-ion, 3.7V, 3000mAh charging time - PC/5 hrs, AC adapter ( not included) / 3 hrsHidden recording on/off switch, no LED flashing in recordingUSB 2.0 high speed upload & download / Plug-in & PlaybackBattery remains indication (LED is off in recording)Dimension & Weight : 93(W) × 27(H) × 23(D)mm / 75gPC O/S : Windows 2000, XP, Vista, 7, 8, 10Accessory : USB charging cable, Magnet, ManualDigital Voice Recorder & Cellphone Portable Charger (World's longest battery use : 150 days in SVOS recording (averaging 1 hour a day) Model No. : D1445Includes:16GB Battery Bank Voice RecorderUSB Connection CableMagnetInstructions This Digital Audio Voice Recorder has an internal 16GB (gigabyte) memory. The battery once fully charged, keeps this voice recorder powered fro 150 days on stand-by using the SVOS (Super Voice Operated Recording System) feature. 150 days of standby is based on the recorder being activated for approx. 1 hour a day. Busy audio environments may use the battery faster. about 30 days based on 4 hours of Audio recording per day. Digital Audio Voice RecorderCovert audio recording disguised as a portable chargeIt will charge phone and mobile devices while traveling or on-the-goUSB Flash Drive : 16GB memorySuper Voice Operated Recording System(SVOS) for max 150 daysSVOS level (sensitivity setting) user option (5 levels).Date and time stamp of the recordings.Hours of battery use on a single charge : 14 days(HQ standard) in continuous record up to 150 days in SVOS standby record.Recording Sound Quality Mode : HQ(64kbps) or XHQ(128kbps) User OptionRecording time : Memory 16GB HQ 576hrs XHQ 288hrs Magnet attachable/detachableMax no. of recording files : 9,999 filesCan be operated by external power supply like PC USB port or USB AC adapterALC function(Automatic Recording Level Control)Rechargeable battery : li-ion, 3.7V, 3000mAh charging time - PC/5 hrs, AC adapter ( not included) / 3 hrsHidden recording on/off switch, no
2025-04-13A matching magnet on top. The result is prodigious flux density, up to 1.7 Tesla (17,000 Gauss), maintained across uncommonly long air gaps, up to 36 mm. This enables distortion-free output up to 120 dB SPL at 1 meter.6-inch midrange driver (x1). The new midrange features a remarkable 4-inch voice coil to help maintain linear output all the way to 120 dB SPL at 1 meter. This results in unmeasurably low distortion throughout the driver’s operating range.11-inch mid bass drivers (x2). This entirely new driver incorporates an N52 grade Neodymium ring magnet of unusual size: 120 mm diameter x 8 mm height, plus a second matching magnet on top for complete control of voice coil movement. It is a new benchmark in linearity.15-inch bass drivers (x2). The new bass driver features a cone molded by 26,500 pounds of pressure. An uncommonly long 36 mm air gap facilitates tremendous linear excursion, ±15 mm, at high sensitivity. You hear the lowest three octaves of bass with full extension and no mid-bass exaggeration.From cone materials to voice coils to magnetic circuits, each one of these features improves linearity and reduces audible distortion. Taken together, they represent the literal state of the art. These are the most advanced dynamic drivers ever made. As always, we simulate, optimize, test and re-test every driver design with the latest Finite Element Analysis tools. Computer testing enables us to simultaneously evaluate acoustical, mechanical, electromagnetic and thermal behaviors. As the driver designs near completion, we conduct the same testing and optimization process on the entire loudspeaker system. AdvertisingMagico Analog Crossover (MXO)The main module of our new analog crossover, the Magico MXO performs bass/midbass bandpass filtering. The power supply occupies a separate chassis, not shown.The 120 Hz crossover frequency between the bass and mid-bass drivers poses a special challenge. At
2025-03-31The real world. So how do we recreate a good mix as humanly possible ? Well we try to think in human hearing in the real world and the disadvantages the common speaker systems have. Also a stereo system can create ambiance and reverbs etc, with plugins you mix in like reverbs and delays, etc. Anything like what is possible works. What works best is having lower frequencies in the middle and higher frequencies more panned outwards on left and right, or even discribute them across the stereo field with intent to place higher frequency sound mor outwards and low frequency more inwards. Stage thinking. But the stereo speakers or headphones do have many disadvantages as to get the human hearing into an amusant pleasurable experience.Speakers come in all shapes and sizes, enabling you to listen to music on your iPod, enjoy a film at the cinema or hear a friend’s voice over the phone. In order to translate an electrical signal into an audible sound, speakers contain an electromagnet: a metal coil which creates a magnetic field when an electric current flows through it. This coil behaves much like a normal (permanent) magnet, with one particularly handy property: reversing the direction of the current in the coil flips the poles of the magnet. Inside a speaker, an electromagnet is placed in front of a permanent magnet. The permanent magnet is fixed firmly into position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed. This means that it is in turn attracted to and repelled from the permanent magnet, vibrating back and forth. The electromagnet is attached to a cone made of a flexible material such as paper or plastic which amplifies these vibrations,
2025-04-18