紅色和白色大音響隔離在白色工作室背景上,有廣告的複製空間. 公共會議,銷售提案,喊叫,大聲語音訊息的公<unk>或地址發聲器.

相關標籤:

• loud
• speaker
• loudspeaker
• loud speaker
• megaphone
• announcement
• amplifier
• shout
• sound speaker
• attention
• voice
• volume
• audio
• microphone
• horn
• broadcast
• sound
• alert
• speak
• warn
• talk
• speech
• call
• public speaker
• public speaking
• object
• announcement background
• background music
• music
• support
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