Howard Leight by Honeywell Impact Sport Sound Amplification Electronic Earmuff, Classic Green (R-01526) is only $26.99 on Amazon today.  You not only block out the loud sounds like a lawn mower or leaf blower, you can still hear normal sounds around you…how do they do that?

• Built-in directional microphones amplify range commands and other ambient sounds to a safe 82dB, providing more natural listening and enhanced communication
• Actively listens and automatically shuts off amplification when ambient sound reaches 82 dB; Noise Reduction Rating (NRR): 22
• Features low profile earcups for stock clearance; adjustable headband for secure fit; compact folding design for convenient storage; Matte black color
• Includes AUX input and 3.5mm connection cord for MP3 players and scanners
• Includes 2 AAA batteries; automatic shut-off feature after 4 hours increases battery life