-
Megaphone PNG File Download Free,Megaphone Background PNG Image Format: PNG Image
Resolution: 1280x1239
Size: 343 kb -
Megaphone PNG Transparent HD Photo,Megaphone Background Transparent PNG Image Format: PNG Image
Resolution: 550x364
Size: 162 kb -
Megaphone PNG Free Download,Megaphone PNG Image Picture Format: PNG Image
Resolution: 2048x2048
Size: 379 kb -
Megaphone PNG Transparent Picture,Megaphone PNG Photos Format: PNG Image
Resolution: 512x512
Size: 15 kb -
Megaphone Background PNG Transparent Image,Megaphone PNG Clipart Format: PNG Image
Resolution: 400x282
Size: 63 kb -
Megaphone PNG Transparent HD Photo,Megaphone Background Transparent PNG Image Format: PNG Image
Resolution: 400x400
Size: 13 kb -
free Megaphone PNG clipart background,Megaphone png background photo download Format: PNG Image
Resolution: 378x499
Size: 114 kb -
Download transparent Megaphone png hd quality,Megaphone png no background Format: PNG Image
Resolution: 850x732
Size: 329 kb -
Megaphone PNG Image With Transparent Background,Megaphone Background PNG Format: PNG Image
Resolution: 256x256
Size: 12 kb -
png Photo image Megaphone free download,Megaphone HD png background image Format: PNG Image
Resolution: 1600x1600
Size: 19 kb -
Megaphone PNG Transparent Picture,Megaphone PNG Photos Format: PNG Image
Resolution: 928x681
Size: 337 kb -
Megaphone PNG Transparent HD Photo,Megaphone Background Transparent PNG Image Format: PNG Image
Resolution: 512x512
Size: 17 kb -
HD transparent background Megaphone png free download,Megaphone png transparent file Format: PNG Image
Resolution: 1440x1464
Size: 556 kb -
png Photo image Megaphone free download,Megaphone HD png background image Format: PNG Image
Resolution: 980x858
Size: 43 kb -
Download transparent Megaphone png hd quality,Megaphone png no background Format: PNG Image
Resolution: 720x720
Size: 136 kb -
Download transparent Megaphone png hd quality,Megaphone png no background Format: PNG Image
Resolution: 512x512
Size: 10 kb -
Megaphone Transparent Background PNG Picture,Megaphone PNG hd pic Format: PNG Image
Resolution: 753x720
Size: 80 kb -
Megaphone PNG Image with transparent background,Megaphone Free PNG Image Format: PNG Image
Resolution: 400x341
Size: 11 kb -
Megaphone png image free download,Megaphone png transparent picture Format: PNG Image
Resolution: 1155x1125
Size: 645 kb -
Megaphone PNG Image With Transparent Background,Megaphone Background PNG Format: PNG Image
Resolution: 1024x1024
Size: 20 kb
A portable or hand-held cone-shaped acoustic horn, usually used to amplify a person's voice or other sounds and point them in a given direction. Raise the sound to the narrow end of the amplifier by raising the sound to the face and speaking to it, and then the sound waves are emitted from the wide end. The loudspeaker increases the volume of sound by increasing the acoustic impedance of the vocal cord, so that the impedance of the vocal cord matches with the air, so as to emit more sound power. It can also point sound waves in the direction the horn points. Because the frequency response of the megaphone is larger at a higher sound frequency, it will distort the voice sound.
Since the 1960s, these voice driven sound amplifiers have been replaced by electric amplifiers, which use power and folded horns to amplify voice.
Electric loudspeaker is a kind of hand-held public address system, which is an electronic device that uses electric power to amplify the human voice like a human loudspeaker. It consists of a microphone that converts sound waves into electronic audio signals, an amplifier powered by a battery to increase the power of the audio signals, and a loudspeaker that converts the audio signals into sound waves again. Although slightly heavier than acoustic loudspeakers, electric loudspeakers can amplify the sound to a higher level, more than 90 dB. In most applications, they have replaced loudspeakers and are often used to broadcast to people where there is no fixed public address system. In outdoor sports events, movie scenes, political rallies and street parades.
- Anchor
- Ax
- Barbwire
- Broom
- Car Wheel
- Chain
- Chainsaw
- Compass
- Crane
- Drill
- Excavator
- Extinguisher
- Fan
- Fire hydrant
- Fish hook
- Gas mask
- Hammer
- Hand saw
- Horseshoe
- Jerrycan
- Ladder
- Loupe
- Magnet
- Measure tape
- Megaphone
- Metal nail
- Microscope
- Motorcycle helmets
- Multi-tool
- Padlock
- Plier
- Plunger
- Rope
- Ruler
- Safe
- Scales
- Scissors
- Scoop net
- Screw
- Screwdriver
- Sewing needle
- Shovel
- Tap
- Typewriter
- Walking stick
- Wrench, spanner